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Cheap flights from Seattle to St. Louis (SEA - STL) from $119

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SEA — STL
May 3 — May 101
From?
To?
Fri 5/3
Fri 5/10
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to Lambert-St Louis are usually found in September or October, booked 50 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from Seattle to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 28, 2024.

Popular in

June

Cheapest in

September

Round-trip from

$323

One-way from

$189
High demand for flights, 23% potential price rise
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Best time to find cheap flights, 22% potential price drop
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From Seattle/Tacoma Intl to Lambert-St Louis
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One-way flight from Seattle/Tacoma Intl to Lambert-St Louis
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What is the cheapest day to fly round-trip from Seattle to St. Louis?

Flying to your destination on a Sunday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to St. Louis. Check prices with Cheapflights to find a great deal for your trip.

How far in advance should I book a flight from Seattle to St. Louis?

To save on the cost of your flight from Seattle to St. Louis, book at least 51 days before your planned departure. Booking around this time can save you about 105% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $344 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $460.

What is the cheapest month to fly from Seattle to St. Louis?

September can be a great time to fly to St. Louis from Seattle with a flight ticket averaging about $381. Cheapflights users have found deals in the month of September for as cheap as $144. The most expensive prices can be found in the month of June.

When is the cheapest time to fly from Seattle to St. Louis (SEA - STL)?

When flying from Seattle to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 25% versus a flight at noon.

Cheap United Airlines flights from Seattle to St. Louis

Explore cheap flight options specifically provided by United Airlines for the route between Seattle and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
Take a peek at the cheapest United Airlines flights we've detected traveling from Seattle to St. Louis. Make sure to check back often as deals are often changing.
Fri 5/37:25 amSEA - STL
2 stops11h 44mUnited Airlines
Sun 5/54:51 pmSTL - SEA
1 stop8h 42mUnited Airlines
Deal found 4/28$361
Fri 5/36:38 amSEA - STL
2 stops11h 16mUnited Airlines
Mon 5/64:51 pmSTL - SEA
1 stop8h 11mUnited Airlines
Deal found 4/27$583
Tue 5/77:25 amSEA - STL
2 stops11h 44mUnited Airlines
Mon 5/204:57 pmSTL - SEA
1 stop7h 55mUnited Airlines
Deal found 4/27$592

  • If you’re traveling from Seattle to St. Louis, one of the more common airlines traveling that route is United Airlines. Flights from United Airlines traveling this route typically cost $366.80 RT. This price is typically 99% more expensive than other airlines that offer Seattle to St. Louis flights. When booking this route, the cheapest RT price found was $186. The most popular departure airport in Seattle when flying to St. Louis is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting St. Louis is Lambert-St Louis Airport. When flying from Seattle to St. Louis, United Airlines flights are 13% more popular than any other airline flying that same route.

Cheap Alaska Airlines flights from Seattle to St. Louis

Explore cheap flight options specifically provided by Alaska Airlines for the route between Seattle and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
Some of the lowest-priced Alaska Airlines flights we've found at this time heading from Seattle to St. Louis. Deals are refreshing constantly so come back soon for more options.
Tue 6/45:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Fri 6/77:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Deal found 4/27$257
Wed 5/226:00 pmSEA - STL
Nonstop3h 59mAlaska Airlines
Sun 5/267:00 amSTL - SEA
Nonstop4h 14mAlaska Airlines
Deal found 4/27$277
Mon 5/207:37 amSEA - STL
Nonstop3h 59mAlaska Airlines
Wed 5/297:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Deal found 4/27$295
Sun 5/2612:43 pmSEA - STL
Nonstop3h 58mAlaska Airlines
Wed 5/297:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Deal found 4/26$297
Sat 5/255:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Sat 6/17:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Deal found 4/27$307
Wed 6/125:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Sun 6/167:00 amSTL - SEA
Nonstop4h 25mAlaska Airlines
Deal found 4/27$317
Sun 5/265:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Mon 5/277:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Deal found 4/27$327
Sat 5/257:37 amSEA - STL
Nonstop3h 59mAlaska Airlines
Sun 6/27:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Deal found 4/27$342
Wed 5/2912:14 pmSEA - STL
1 stop7h 33mAlaska Airlines
Mon 6/37:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Deal found 4/27$356

  • Alaska Airlines is one of the most popular airlines used for those traveling from Seattle to St. Louis. Flights on this route from Alaska Airlines typically cost $459.57 RT, a price that is 56% cheaper than the average Seattle to St. Louis flight. The cheapest flight found was $157 RT. Seattle/Tacoma Intl Airport is the most common Seattle airport to take off from when flying to St. Louis. Lambert-St Louis Airport is the most popular arrival airport in St. Louis. When flying from Seattle to St. Louis, Alaska Airlines flights are 1% more popular than any other airline flying that same route.

Cheap Seattle to St. Louis flights in April & May 2024

Find cheap flight options from Seattle to St. Louis specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,944,896 searches. Prices were last updated on April 28, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to St. Louis in 2024. Check back regularly for other flight deals.
Tue 5/219:40 pmSEA - STL
1 stop11h 06mMultiple Airlines
Thu 5/237:23 pmSTL - SEA
1 stop26h 41mMultiple Airlines
Deal found 4/26$154
Thu 5/3011:02 pmSEA - STL
1 stop9h 11mMultiple Airlines
Wed 6/51:55 pmSTL - SEA
1 stop8h 14mMultiple Airlines
Deal found 4/27$178
Thu 5/3011:02 pmSEA - STL
1 stop9h 11mMultiple Airlines
Mon 6/34:05 pmSTL - SEA
1 stop18h 40mMultiple Airlines
Deal found 4/27$184
Mon 5/278:00 pmSEA - STL
1 stop12h 13mMultiple Airlines
Mon 6/34:05 pmSTL - SEA
1 stop18h 40mMultiple Airlines
Deal found 4/27$189
Tue 5/289:40 pmSEA - STL
1 stop11h 06mMultiple Airlines
Wed 5/297:23 pmSTL - SEA
1 stop28h 49mMultiple Airlines
Deal found 4/27$193
Tue 5/289:40 pmSEA - STL
1 stop11h 06mSpirit Airlines
Fri 5/314:05 pmSTL - SEA
1 stop23h 53mSpirit Airlines
Deal found 4/27$196
Mon 5/208:00 pmSEA - STL
1 stop12h 13mFrontier
Wed 5/297:23 pmSTL - SEA
1 stop28h 49mFrontier
Deal found 4/27$198
Mon 5/69:55 amSEA - STL
1 stop9h 08mFrontier
Mon 5/139:53 pmSTL - SEA
1 stop13h 51mFrontier
Deal found 4/28$199
Fri 5/109:40 amSEA - STL
1 stop9h 47mFrontier
Thu 5/1611:06 pmSTL - SEA
1 stop11h 39mFrontier
Deal found 4/28$200

Seattle to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Seattle and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to St. Louis in 2024. Check back regularly for other flight deals.
Wed 5/291:15 amSEA - STL
1 stop7h 22mAmerican Airlines
Mon 6/36:18 pmSTL - SEA
1 stop7h 57mAmerican Airlines
Deal found 4/27$231
Wed 8/1411:30 amSEA - STL
1 stop20h 48mFrontier
Sat 8/318:00 pmSTL - SEA
1 stop14h 37mFrontier
Deal found 4/26$233
Thu 5/2311:02 pmSEA - STL
1 stop9h 11mFrontier
Sat 6/18:04 pmSTL - SEA
1 stop13h 00mFrontier
Deal found 4/27$235
Tue 5/287:37 amSEA - STL
Nonstop3h 59mMultiple Airlines
Fri 5/3110:21 pmSTL - SEA
1 stop11h 49mMultiple Airlines
Deal found 4/27$237
Thu 5/95:31 pmSEA - STL
1 stop14h 47mFrontier
Mon 5/2010:21 pmSTL - SEA
1 stop13h 34mFrontier
Deal found 4/28$238
Sat 5/42:55 pmSEA - STL
1 stop21h 34mFrontier
Mon 5/69:53 pmSTL - SEA
1 stop13h 51mFrontier
Deal found 4/28$241
Thu 5/2311:02 pmSEA - STL
1 stop9h 11mMultiple Airlines
Sun 5/266:20 pmSTL - SEA
1 stop15h 35mMultiple Airlines
Deal found 4/26$243
Sun 5/59:20 pmSEA - STL
1 stop10h 58mFrontier
Wed 5/87:51 pmSTL - SEA
1 stop22h 40mFrontier
Deal found 4/28$244
Fri 5/39:40 amSEA - STL
1 stop9h 47mFrontier
Mon 5/69:53 pmSTL - SEA
1 stop13h 51mFrontier
Deal found 4/27$246

Non-stop flights to St. Louis from Seattle

Discover non-stop flight options from Seattle to St. Louis. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
Consider booking one of these non-stop flights heading from Seattle to St. Louis. Select from other flights from Seattle to St. Louis by using the search form above.
Tue 6/45:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Fri 6/77:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Deal found 4/27$257
Wed 5/2212:43 pmSEA - STL
Nonstop3h 58mAlaska Airlines
Sun 5/267:00 amSTL - SEA
Nonstop4h 14mAlaska Airlines
Deal found 4/28$277
Mon 5/207:37 amSEA - STL
Nonstop3h 59mAlaska Airlines
Wed 5/297:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Deal found 4/27$295
Sun 5/267:37 amSEA - STL
Nonstop3h 59mAlaska Airlines
Sun 5/267:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Deal found 4/26$297
Sat 5/255:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Sat 6/17:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Deal found 4/27$307
Wed 6/125:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Sun 6/167:00 amSTL - SEA
Nonstop4h 25mAlaska Airlines
Deal found 4/27$317
Sun 5/265:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Mon 5/277:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Deal found 4/27$327
Sat 5/257:37 amSEA - STL
Nonstop3h 59mAlaska Airlines
Wed 5/292:36 pmSTL - SEA
Nonstop4h 13mAlaska Airlines
Deal found 4/27$342
Fri 5/245:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Sun 5/267:00 amSTL - SEA
Nonstop4h 14mAlaska Airlines
Deal found 4/27$357

Seattle to St. Louis flights leaving soon

Find last-minute flight options from Seattle to St. Louis for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
Check out these flights departing soon from Seattle to St. Louis. To prevent any unwanted surprises, users should verify their flight info before booking.
Mon 5/69:55 amSEA - STL
1 stop9h 08mFrontier
Mon 5/139:53 pmSTL - SEA
1 stop13h 51mFrontier
Deal found 4/28$199
Tue 5/79:19 pmSEA - STL
1 stop11h 27mMultiple Airlines
Mon 5/2010:21 pmSTL - SEA
1 stop13h 34mMultiple Airlines
Deal found 4/27$203
Sat 5/49:32 pmSEA - STL
1 stop14h 57mFrontier
Wed 5/87:51 pmSTL - SEA
1 stop22h 40mFrontier
Deal found 4/27$210
Fri 5/39:40 amSEA - STL
1 stop9h 47mFrontier
Mon 5/69:53 pmSTL - SEA
1 stop13h 51mFrontier
Deal found 4/27$246
Fri 5/312:59 amSEA - STL
1 stop7h 37mAmerican Airlines
Wed 5/82:00 pmSTL - SEA
1 stop10h 41mAmerican Airlines
Deal found 4/27$264
Fri 5/36:03 pmSEA - STL
1 stop13h 44mFrontier
Sun 5/53:29 pmSTL - SEA
1 stop17h 51mFrontier
Deal found 4/28$285
Mon 5/66:03 pmSEA - STL
Nonstop3h 56mMultiple Airlines
Mon 5/139:53 pmSTL - SEA
1 stop13h 51mMultiple Airlines
Deal found 4/28$359
Fri 5/37:25 amSEA - STL
2 stops11h 44mUnited Airlines
Sun 5/54:51 pmSTL - SEA
1 stop8h 42mUnited Airlines
Deal found 4/28$361
Wed 5/81:15 amSEA - STL
1 stop7h 22mAmerican Airlines
Mon 5/135:21 amSTL - SEA
1 stop7h 28mAmerican Airlines
Deal found 4/28$408

One-way flights to St. Louis from Seattle

Search for one-way flight options from Seattle to St. Louis. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
Users in need of a one-way flight from Seattle to St. Louis can choose from these deals. Those seeking round-trip flights from Seattle to St. Louis should utilize the search form at the the top of the page.
Tue 6/45:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Deal found 4/27$119
Sat 6/229:00 amSEA - STL
1 stop10h 00mFrontier
Deal found 4/27$120
Tue 6/258:12 pmSEA - STL
1 stop11h 18mFrontier
Deal found 4/27$126
Tue 5/71:15 amSEA - STL
1 stop9h 16mAmerican Airlines
Deal found 4/26$133
Sun 5/2612:43 pmSEA - STL
Nonstop3h 58mAlaska Airlines
Deal found 4/27$139
Tue 6/259:41 pmSEA - STL
1 stop13h 24mSpirit Airlines
Deal found 4/28$147
Mon 5/205:35 pmSEA - STL
2 stops18h 02mMultiple Airlines
Deal found 4/26$154
Mon 6/107:37 amSEA - STL
Nonstop3h 59mAlaska Airlines
Deal found 4/28$159
Thu 6/612:20 amSEA - STL
1 stop6h 34mAmerican Airlines
Deal found 4/27$179

Find flights from Seattle to St. Louis within your budget

Customize your flight search to find flights from Seattle to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$231 - $369

Route

Depart

Return

Price

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 5/29

1 stop7h 22m

Lambert-St Louis

Mon 6/3

1 stop7h 57m

$231

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Thu 5/23

1 stop9h 11m

Lambert-St Louis

Sat 6/1

1 stop13h 00m

$235

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Tue 5/28

Nonstop3h 59m

Lambert-St Louis

Fri 5/31

1 stop11h 49m

$237

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Thu 5/9

1 stop14h 47m

Lambert-St Louis

Mon 5/20

1 stop13h 34m

$238

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Tue 6/4

Nonstop4h 01m

Lambert-St Louis

Fri 6/7

Nonstop4h 19m

$257

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Thu 5/2

1 stop8h 24m

Lambert-St Louis

Tue 5/7

1 stop6h 29m

$266

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Thu 7/11

1 stop14h 30m

Lambert-St Louis

Sun 7/14

1 stop15h 31m

$270

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Fri 5/3

2 stops11h 44m

Lambert-St Louis

Sun 5/5

1 stop8h 42m

$361

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Tue 5/7

1 stop11h 27m

Lambert-St Louis

Sat 5/11

3 stops41h 30m

$369

Flights are sorted by cheapest first

Deals found on 4/27

When is the best time to book a flight from Seattle to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to St. Louis. Price data was last updated on January 28, 2024.
The best time to book flights from Seattle to St. Louis is 50 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Search Deals

When is the cheapest time to fly from Seattle to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Seattle to St. Louis. Price data was last updated on April 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to St. Louis flight should consider departing on Friday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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Average price of flights to St. Louis by month

Plan your trip from Seattle to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to St. Louis is currently $142 while a round-trip flight costs $274. Price data was last updated on April 21, 2024.

Currently, September is the cheapest month in which you can book a flight from Seattle to St. Louis (average of $323). Flying from Seattle to St. Louis in July is currently the most expensive (average of $378). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$326

February

$331

March

$357

April

$337

May

$350

June

$373

July

$378

August

$336

September

$323

October

$323

November

$336

December

$326

Temperature and rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature and rainfall totals by month.

STL

Temperature

32 - 80.6 °F

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated April 28, 2024.
Get a feel of what it's like to fly with United Airlines, Alaska Airlines and American Airlines from Seattle to St. Louis by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,110 reviews
Check prices

Overall

8.1

Entertainment

7.3

Comfort

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

Alaska Airlines
8.1
Very good
9,110 reviews
Alaska Airlines
8.1
Very good
9,110 reviews
Check prices

Overall

8.1

Entertainment

7.3

Comfort

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

Delta
8.1
Very good
10,932 reviews
Alaska Airlines
8.1
Very good
9,110 reviews
Check prices

Overall

8.1

Entertainment

7.3

Comfort

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

United Airlines
7.4
Good
11,221 reviews
Alaska Airlines
8.1
Very good
9,110 reviews
Check prices

Overall

8.1

Entertainment

7.3

Comfort

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

American Airlines
7.3
Good
14,844 reviews
Alaska Airlines
8.1
Very good
9,110 reviews
Check prices

Overall

8.1

Entertainment

7.3

Comfort

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

Sun Country Air
7.3
Good
656 reviews
Alaska Airlines
8.1
Very good
9,110 reviews
Check prices

Overall

8.1

Entertainment

7.3

Comfort

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

Related info for your journey

Find useful and relevant information for your journey from Seattle to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Seattle to St. Louis?

    If you book a flight from Seattle to St. Louis, you will be flying from Seattle/Tacoma Intl to Lambert-St Louis. Flights to Lambert-St Louis (STL) from Seattle/Tacoma Intl (SEA) take 3h 49m for a nonstop flight. There are 6 flights from Seattle/Tacoma Intl to St. Louis per day from 6 airlines.

  • Can I find flights from Seattle to St. Louis for under $300 on Cheapflights?

    Yes, there are multiple flights from Seattle to St. Louis for under $300. The cheapest flight booked recently is on American Airlines for just $231, but on average you can expect to pay $247.

  • Are there nonstop flights from Seattle to St. Louis for under $300 on Cheapflights?

    Cheapflights has at least 20 direct flights from Seattle to St. Louis under $300. A good price for a nonstop flight from Seattle to St. Louis is less than $371.

  • Are there last-minute flights available from Seattle to St. Louis for under $200?

    There are currently 20+ open flights from Seattle to St. Louis within the next 7 days for less than $200.

  • How popular is this Seattle to St. Louis flight route?

    The Seattle/Tacoma Intl to Lambert-St Louis flight path was viewed by 28 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines flying from Seattle to St. Louis round-trip?

    Cheapflights users have booked flights from Seattle to St. Louis round-trip from $231. Other airlines that can offer you cheap pricing are Frontier, from $235, and Alaska Airlines, from $257. These flights start at 39% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Seattle to St. Louis one-way?

    $119 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Frontier and American Airlines, with prices starting from $120 and $133, respectively.

  • What are the most popular airlines that fly from Seattle to St. Louis?

    American Airlines, Alaska Airlines and Delta are the most popular airlines when flying from Seattle to St. Louis.

  • What are the most reliable airlines from Seattle to St. Louis?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to St. Louis on time: American Airlines (94%), Alaska Airlines (90%), Air Tahiti Nui (90%).

  • What are the cheapest flights from Seattle to St. Louis?

    The cheapest flight price from Seattle to St. Louis is $118. On average you can expect to pay $342. The most popular route, (Seattle/Tacoma Intl - Lambert-St Louis), can usually be booked for $154.

  • What does SEA to STL mean?

    SEA stands for Seattle/Tacoma Intl Airport, while STL stands for Lambert-St Louis Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Can I find deals for flights from Seattle to St. Louis that include extra baggage allowance?

    The amount of baggage you can bring on your Seattle to St. Louis flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Seattle to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to St. Louis flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Seattle to St. Louis that include hotel bookings?

    Yes. In addition to deals on Seattle to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to St. Louis.

  • Can I find deals for business class flights from Seattle to St. Louis?

    Yes. Cheapflights offers flight deals from Seattle to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Seattle to St. Louis that allow pets onboard?

    Many airlines flying from Seattle to St. Louis offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Seattle to St. Louis?

    Yes, you can often find last-minute deals on Seattle to St. Louis flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Seattle to St. Louis flight deals updated?

    The Seattle to St. Louis flight deals you see on this page were last updated on 4/28.

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See prices for flight routes from nearby airports that may be better suited for you.

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Top 6 airlines flying from Seattle to St. Louis

Discover the top 6 airlines that operate flights from Seattle to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$112Average$257FlexibilityNo cancel feeOn-time62%
Search Frontier flights
DeltaCheapest$152Average$287FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Spirit AirlinesCheapest$156Average$301FlexibilityNo cancel feeOn-time65%
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American AirlinesCheapest$157Average$460FlexibilityNo cancel feeOn-time71%
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United AirlinesCheapest$164Average$316FlexibilityNo cancel feeOn-time69%
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Alaska AirlinesCheapest$186Average$367FlexibilityNo cancel feeOn-time75%
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Search flights from Seattle to St. Louis by cabin class

Find flights from Seattle to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from Seattle to St. Louis

Find hourly flight availability from Seattle to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 28, 2024.
1%of flight departuresEarly morningMidnight to 6 am
44%of flight departuresMorning6 am to noon
55%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Seattle to St. Louis

Explore weekly flight availability from Seattle to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 28, 2024.
Sunday9daily flights
Monday8daily flights
Tuesday4daily flights
Wednesday8daily flights
Thursday4daily flights
Friday8daily flights
Saturday3daily flights

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How does Cheapflights help users find flights from Seattle to St. Louis?

Cheapflights makes it easy to find Seattle to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to St. Louis from Seattle.

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Yes, we can. To see specific flights from Seattle to St. Louis with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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