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Cheap flights from St. Louis (STL) to Washington, D.C. (WAS) from $69

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 5/14. 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.
STL — WAS
May 9 — May 161
From?
To?
Thu 5/9
Thu 5/16
1 adult, Economy
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The best prices from Lambert-St Louis to Washington, D.C. are usually found in January or December, booked 62 days in advance, depart on a Wednesday or Friday and return on a Saturday

Cheap flight deals from St. Louis to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Washington, D.C. (WAS). 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 May 4, 2024.

Popular in

June

Cheapest in

January

Round-trip from

$234

One-way from

$110
High demand for flights, 18% potential price rise
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Best time to find cheap flights, 25% potential price drop
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From Lambert-St Louis to Washington, D.C. (WAS)
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One-way flight from Lambert-St Louis to Washington, D.C. (WAS)
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What is the cheapest day to fly round-trip from St. Louis to Washington, D.C.?

Flights from St. Louis to Washington, D.C. are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington, D.C..

How far in advance should I book a flight from St. Louis to Washington, D.C.?

Travelers have found it’s best to book a flight 53 days in advance to save up to 96% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 53 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St. Louis to Washington, D.C. 1-2 weeks in advance for as low as $310, or $462 for flights within the next 24 hours.

What is the cheapest month to fly from St. Louis to Washington, D.C.?

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, January can be a great choice for travel to Washington, D.C.. Flights to Washington, D.C. from St. Louis in January are about $278 on average during January, but can be found for as low as $108.

When is the cheapest time to fly from St. Louis to Washington, D.C. (STL - WAS)?

It’s typically best to fly out from St. Louis to Washington, D.C. in the evening. Doing so could potentially save you 42% on the flight price compared to flying at noon, which is usually more expensive.

Cheap Sun Country Air flights from St. Louis to Washington, D.C.

Explore cheap flight options specifically provided by Sun Country Air for the route between St. Louis and Washington, D.C.. 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 2,864,334 searches. Data last updated May 4, 2024.
Take a look at some of the lowest-priced Sun Country Air flights heading from St. Louis to Washington, D.C.. Come back soon if you're not finding the exact deal you're looking for.
Fri 9/136:50 pmSTL - IAD
1 stop24h 36mSun Country Air
Sun 9/1512:33 pmIAD - STL
1 stop5h 55mSun Country Air
Deal found 5/2$245
Sun 6/166:30 amSTL - IAD
1 stop5h 23mSun Country Air
Fri 6/217:50 pmIAD - STL
1 stop25h 11mSun Country Air
Deal found 5/3$305
Sun 7/216:00 pmSTL - IAD
1 stop23h 10mSun Country Air
Sun 7/281:53 pmIAD - STL
1 stop27h 29mSun Country Air
Deal found 5/2$325

  • Sun Country Air is one of the most popular airlines used for those traveling from St. Louis to Washington, D.C.. Flights on this route from Sun Country Air typically cost $350.20 RT, a price that is 70% more expensive than the average St. Louis to Washington, D.C. flight. The cheapest flight found was $191 RT. The most popular departure airport in St. Louis when flying to Washington, D.C. is Lambert-St Louis Airport. The most popular airport to fly into when visiting Washington, D.C. is Washington, D.C. Dulles Intl Airport. When flying from St. Louis to Washington, D.C., Sun Country Air flights are 4% more popular than any other airline flying that same route.

Cheap Delta flights from St. Louis to Washington, D.C.

Explore cheap flight options specifically provided by Delta for the route between St. Louis and Washington, D.C.. 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 2,864,334 searches. Data last updated May 4, 2024.
Take a gander at the lowest prices we've found on Delta flights from St. Louis to Washington, D.C.. Check back soon if you're not seeing flights that suit your needs.
Sat 5/255:07 pmSTL - DCA
1 stop5h 50mDelta
Tue 5/285:45 pmDCA - STL
1 stop6h 55mDelta
Deal found 5/3$188
Wed 6/266:00 amSTL - IAD
1 stop4h 40mDelta
Tue 7/26:00 amIAD - STL
1 stop4h 10mDelta
Deal found 5/2$203
Mon 7/15:25 pmSTL - IAD
1 stop5h 34mDelta
Fri 7/56:10 amIAD - STL
1 stop4h 05mDelta
Deal found 5/3$208
Thu 5/305:02 pmSTL - IAD
1 stop5h 53mDelta
Sun 6/27:54 pmIAD - STL
1 stop4h 46mDelta
Deal found 5/3$218
Wed 5/156:30 pmSTL - IAD
1 stop4h 25mDelta
Thu 5/166:00 amIAD - STL
1 stop4h 19mDelta
Deal found 5/3$419
Wed 5/152:55 pmSTL - DCA
1 stop7h 01mDelta
Thu 5/166:00 amDCA - STL
1 stop5h 05mDelta
Deal found 5/3$458
Fri 5/175:02 pmSTL - IAD
1 stop5h 53mDelta
Sun 5/196:00 amIAD - STL
1 stop4h 19mDelta
Deal found 5/2$465
Tue 5/76:00 amSTL - IAD
1 stop4h 34mDelta
Wed 5/86:00 amIAD - STL
1 stop4h 19mDelta
Deal found 5/3$554
Tue 5/76:12 pmSTL - IAD
1 stop3h 40mDelta
Fri 5/106:11 pmIAD - STL
1 stop4h 23mDelta
Deal found 5/4$722

  • One of the most popular airlines traveling from St. Louis to Washington, D.C. is Delta. Flights from Delta traveling this route typically cost $379.15 RT. This price is typically 50% cheaper than other airlines that offer St. Louis to Washington, D.C. flights. When booking this route, the cheapest RT price found was $197. Lambert-St Louis Airport is the most common St. Louis airport to take off from when flying to Washington, D.C.. Washington, D.C. Dulles Intl Airport is the most popular arrival airport in Washington, D.C.. When flying from St. Louis to Washington, D.C., Delta flights are 4% more popular than any other airline flying that same route.

Cheap St. Louis to Washington, D.C. flights in May & June 2024

Find cheap flight options from St. Louis to Washington, D.C. specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,864,334 searches. Prices were last updated on May 4, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Washington, D.C. in 2024. For more flight deals, be sure to check back very soon.
Thu 5/1611:06 pmSTL - BWI
1 stop11h 27mFrontier
Tue 5/218:28 pmBWI - STL
1 stop24h 42mFrontier
Deal found 5/3$143
Wed 5/155:56 pmSTL - BWI
1 stop14h 04mFrontier
Sat 5/182:37 pmBWI - STL
1 stop17h 31mFrontier
Deal found 5/3$144
Thu 6/67:44 pmSTL - BWI
1 stop11h 03mFrontier
Sat 6/88:15 pmBWI - STL
1 stop11h 52mFrontier
Deal found 5/3$151
Wed 5/155:56 pmSTL - BWI
1 stop14h 04mFrontier
Thu 5/1610:00 pmBWI - STL
1 stop10h 08mFrontier
Deal found 5/3$154
Wed 5/155:56 pmSTL - BWI
1 stop14h 04mFrontier
Mon 5/208:38 amBWI - STL
1 stop23h 30mFrontier
Deal found 5/2$159
Wed 5/155:56 pmSTL - BWI
1 stop14h 04mFrontier
Thu 5/1610:00 pmBWI - STL
1 stop10h 08mFrontier
Deal found 5/3$160
Tue 5/144:50 pmSTL - DCA
1 stop18h 10mFrontier
Mon 5/206:57 pmDCA - STL
1 stop19h 12mFrontier
Deal found 5/2$163
Wed 5/155:56 pmSTL - BWI
1 stop14h 04mFrontier
Mon 5/201:44 pmBWI - STL
2 stops18h 24mFrontier
Deal found 5/2$164
Sat 6/86:22 pmSTL - BWI
1 stop13h 13mSpirit Airlines
Mon 6/105:31 pmBWI - STL
1 stop18h 26mSpirit Airlines
Deal found 5/2$172

St. Louis to Washington, D.C. 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Washington, D.C. in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,864,334 searches. Data last updated May 4, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Washington, D.C. in 2024. For more flight deals, be sure to check back very soon.
Thu 5/1611:06 pmSTL - BWI
1 stop11h 27mFrontier
Tue 5/218:28 pmBWI - STL
1 stop24h 42mFrontier
Deal found 5/3$143
Wed 5/155:56 pmSTL - BWI
1 stop14h 04mFrontier
Sat 5/182:37 pmBWI - STL
1 stop17h 31mFrontier
Deal found 5/3$144
Thu 6/67:44 pmSTL - BWI
1 stop11h 03mFrontier
Sat 6/88:15 pmBWI - STL
1 stop11h 52mFrontier
Deal found 5/3$151
Wed 5/155:56 pmSTL - BWI
1 stop14h 04mFrontier
Thu 5/1610:00 pmBWI - STL
1 stop10h 08mFrontier
Deal found 5/3$154
Wed 5/155:56 pmSTL - BWI
1 stop14h 04mFrontier
Mon 5/208:38 amBWI - STL
1 stop23h 30mFrontier
Deal found 5/2$159
Wed 5/155:56 pmSTL - BWI
1 stop14h 04mFrontier
Thu 5/1610:00 pmBWI - STL
1 stop10h 08mFrontier
Deal found 5/3$160
Tue 5/144:50 pmSTL - DCA
1 stop18h 10mFrontier
Mon 5/206:57 pmDCA - STL
1 stop19h 12mFrontier
Deal found 5/2$163
Wed 5/155:56 pmSTL - BWI
1 stop14h 04mFrontier
Mon 5/201:44 pmBWI - STL
2 stops18h 24mFrontier
Deal found 5/2$164
Mon 9/98:00 pmSTL - DCA
1 stop15h 09mFrontier
Tue 9/176:59 pmDCA - STL
1 stop15h 38mFrontier
Deal found 5/2$168

Non-stop flights to Washington, D.C. from St. Louis

Discover non-stop flight options from St. Louis to Washington, D.C.. 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 2,864,334 searches. Data last updated May 4, 2024.
To help reduce your travel time, choose from one of these non-stop flights from St. Louis to Washington, D.C.. Those looking to potentially save on 1 or 2-stop flights from St. Louis to Washington, D.C. should utilize the search form at the the top of the page.
Wed 6/266:09 amSTL - DCA
Nonstop2h 02mAmerican Airlines
Tue 7/28:00 pmDCA - STL
Nonstop2h 28mAmerican Airlines
Deal found 5/2$184
Thu 6/276:09 amSTL - DCA
Nonstop2h 02mAmerican Airlines
Mon 7/18:00 pmDCA - STL
Nonstop2h 28mAmerican Airlines
Deal found 5/3$189
Sat 6/86:09 amSTL - DCA
Nonstop2h 02mAmerican Airlines
Mon 6/108:00 pmDCA - STL
Nonstop2h 28mAmerican Airlines
Deal found 5/2$209
Tue 6/46:16 amSTL - DCA
Nonstop1h 59mAmerican Airlines
Fri 6/143:26 pmDCA - STL
Nonstop2h 25mAmerican Airlines
Deal found 5/4$213
Mon 7/156:10 amSTL - DCA
Nonstop2h 01mAmerican Airlines
Wed 7/173:26 pmDCA - STL
Nonstop2h 21mAmerican Airlines
Deal found 5/3$228
Mon 7/156:10 amSTL - DCA
Nonstop2h 01mAmerican Airlines
Fri 7/198:00 pmDCA - STL
Nonstop2h 29mAmerican Airlines
Deal found 5/3$233
Tue 6/46:16 amSTL - DCA
Nonstop1h 59mAmerican Airlines
Fri 6/148:00 pmDCA - STL
Nonstop2h 28mAmerican Airlines
Deal found 5/3$234
Tue 6/116:09 amSTL - DCA
Nonstop2h 02mAmerican Airlines
Thu 6/138:00 pmDCA - STL
Nonstop2h 28mAmerican Airlines
Deal found 5/3$249
Fri 6/285:42 pmSTL - DCA
Nonstop2h 01mAmerican Airlines
Sun 7/78:00 pmDCA - STL
Nonstop2h 29mAmerican Airlines
Deal found 5/3$254

St. Louis to Washington, D.C. flights leaving soon

Find last-minute flight options from St. Louis to Washington, D.C. 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 2,864,334 searches. Data last updated May 4, 2024.
Check out these flights departing soon from St. Louis to Washington, D.C.. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
Tue 5/144:50 pmSTL - DCA
1 stop18h 10mFrontier
Tue 9/1012:59 pmDCA - STL
1 stop21h 38mFrontier
Deal found 5/4$146
Wed 5/158:04 pmSTL - DCA
1 stop14h 59mFrontier
Mon 5/206:57 pmDCA - STL
1 stop19h 12mFrontier
Deal found 5/2$163
Tue 5/144:50 pmSTL - DCA
1 stop18h 10mFrontier
Fri 5/177:00 amDCA - STL
1 stop27h 25mFrontier
Deal found 5/3$173
Wed 5/158:04 pmSTL - DCA
1 stop14h 59mFrontier
Fri 5/177:00 amDCA - STL
1 stop27h 25mFrontier
Deal found 5/3$175
Fri 5/105:35 pmSTL - BWI
1 stop17h 25mFrontier
Mon 5/138:32 pmBWI - STL
1 stop11h 41mFrontier
Deal found 5/3$228
Fri 5/178:45 pmSTL - DCA
1 stop14h 18mFrontier
Sun 5/197:00 amDCA - STL
1 stop27h 36mFrontier
Deal found 5/3$237
Sat 5/115:15 pmSTL - BWI
1 stop6h 18mSpirit Airlines
Mon 5/1310:12 pmBWI - STL
1 stop12h 27mSpirit Airlines
Deal found 5/3$238
Tue 5/74:50 pmSTL - DCA
1 stop18h 10mFrontier
Tue 5/146:51 pmDCA - STL
1 stop15h 56mFrontier
Deal found 5/3$257
Fri 5/107:16 pmSTL - BWI
1 stop18h 40mFrontier
Sun 5/125:40 pmBWI - STL
1 stop27h 31mFrontier
Deal found 5/3$260

One-way flights to Washington, D.C. from St. Louis

Search for one-way flight options from St. Louis to Washington, D.C.. 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 2,864,334 searches. Data last updated May 4, 2024.
Users in need of a one-way flight from St. Louis to Washington, D.C. can choose from these deals. Users in need of a round-trip flight from St. Louis to Washington, D.C. instead should update the search form at the top of page.
Tue 5/142:35 pmSTL - BWI
1 stop16h 40mSpirit Airlines
Deal found 5/1$69
Sat 6/19:29 pmSTL - BWI
1 stop9h 34mFrontier
Deal found 5/2$76
Wed 5/155:56 pmSTL - BWI
1 stop14h 04mFrontier
Deal found 5/2$80
Thu 5/1611:06 pmSTL - BWI
1 stop11h 27mFrontier
Deal found 5/2$81
Sun 6/211:22 pmSTL - BWI
1 stop11h 11mFrontier
Deal found 5/2$83
Tue 5/144:50 pmSTL - DCA
1 stop18h 10mFrontier
Deal found 5/3$85
Tue 5/144:50 pmSTL - BWI
2 stops21h 26mFrontier
Deal found 5/1$85
Thu 5/1611:06 pmSTL - DCA
1 stop11h 57mFrontier
Deal found 5/3$86
Tue 5/147:16 pmSTL - BWI
1 stop18h 40mFrontier
Deal found 5/2$86

Find flights from St. Louis to Washington, D.C. within your budget

Customize your flight search to find flights from St. Louis to Washington, D.C. 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 2,864,334 searches. Data last updated May 4, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$138 - $245

Route

Depart

Return

Price

Lambert-St LouisBaltimore/Washington

STL - BWI

STLBWI

Lambert-St Louis

Sat 6/1

1 stop9h 34m

Baltimore/Washington

Sat 6/8

1 stop11h 52m

$138

Lambert-St LouisBaltimore/Washington

STL - BWI

STLBWI

Lambert-St Louis

Wed 5/8

1 stop21h 34m

Baltimore/Washington

Sat 5/11

1 stop11h 13m

$140

Lambert-St LouisBaltimore/Washington

STL - BWI

STLBWI

Lambert-St Louis

Thu 5/16

1 stop11h 27m

Baltimore/Washington

Sat 5/25

1 stop11h 27m

$142

Lambert-St LouisBaltimore/Washington

STL - BWI

STLBWI

Lambert-St Louis

Tue 5/14

2 stops19h 36m

Baltimore/Washington

Mon 5/20

2 stops17h 14m

$152

Lambert-St LouisWashington, D.C. Reagan-National

STL - DCA

STLDCA

Lambert-St Louis

Wed 6/26

Nonstop2h 02m

Washington, D.C. Reagan-National

Tue 7/2

Nonstop2h 28m

$184

Lambert-St LouisWashington, D.C. Reagan-National

STL - DCA

STLDCA

Lambert-St Louis

Sat 5/25

1 stop5h 50m

Washington, D.C. Reagan-National

Tue 5/28

1 stop6h 55m

$188

Lambert-St LouisBaltimore/Washington

STL - BWI

STLBWI

Lambert-St Louis

Sat 5/11

1 stop6h 18m

Baltimore/Washington

Sat 5/18

1 stop17h 31m

$188

Lambert-St LouisWashington, D.C. Reagan-National

STL - DCA

STLDCA

Lambert-St Louis

Thu 6/27

1 stop4h 50m

Washington, D.C. Reagan-National

Mon 7/1

1 stop4h 40m

$232

Lambert-St LouisWashington, D.C. Dulles Intl

STL - IAD

STLIAD

Lambert-St Louis

Fri 9/13

1 stop24h 36m

Washington, D.C. Dulles Intl

Sun 9/15

1 stop5h 55m

$245

Flights are sorted by cheapest first

Deals found on 5/2

When is the best time to book a flight from St. Louis to Washington, D.C.?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Washington, D.C.. Price data was last updated on May 3, 2024.
Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Search Deals

When is the cheapest time to fly from St. Louis to Washington, D.C.?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Washington, D.C.. Price data was last updated on April 28, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Washington, D.C. flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday 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 Washington, D.C. by month

Plan your trip from St. Louis to Washington, D.C. by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Washington, D.C. is currently $81 while a round-trip flight costs $179. Price data was last updated on April 28, 2024.

Currently, September is the cheapest month in which you can book a flight from St. Louis to Washington, D.C. (average of $281). Flying from St. Louis to Washington, D.C. in June is currently the most expensive (average of $398). 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

$308

February

$303

March

$358

April

$337

May

$337

June

$398

July

$378

August

$296

September

$281

October

$303

November

$328

December

$291

Temperature and rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature and rainfall totals by month.

WAS

Temperature

35.6 - 80.6 °F

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated May 4, 2024.
Peruse reviews from past customers who have flown with Sun Country Air, Delta and United Airlines from St. Louis to Washington, D.C. to help guide your decision. 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
9,128 reviews
Check prices

Overall

8.1

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.6

Entertainment

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,128 reviews
Alaska Airlines
8.1
Very good
9,128 reviews
Check prices

Overall

8.1

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.6

Entertainment

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Delta
8.1
Very good
10,848 reviews
Alaska Airlines
8.1
Very good
9,128 reviews
Check prices

Overall

8.1

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.6

Entertainment

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Qatar Airways
7.7
Good
4,444 reviews
Alaska Airlines
8.1
Very good
9,128 reviews
Check prices

Overall

8.1

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.6

Entertainment

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines
7.4
Good
11,134 reviews
Alaska Airlines
8.1
Very good
9,128 reviews
Check prices

Overall

8.1

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.6

Entertainment

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

American Airlines
7.3
Good
14,755 reviews
Alaska Airlines
8.1
Very good
9,128 reviews
Check prices

Overall

8.1

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.6

Entertainment

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Related info for your journey

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

  • What airport do you fly from for flights from St. Louis to Washington, D.C.?

    If you book a flight to Washington, D.C. from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 11 flights from Lambert-St Louis to Washington, D.C. per day from 5 different airlines.

  • Can I find flights from St. Louis to Washington, D.C. for under $200 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Washington, D.C. for under $200. The cheapest flight booked recently is on Frontier for just $138, but on average you can expect to pay $153.

  • Are there nonstop flights from St. Louis to Washington, D.C. for under $200 on Cheapflights?

    Cheapflights has at least 20 direct flights from St. Louis to Washington, D.C. under $200. A good price for a nonstop flight from St. Louis to Washington, D.C. is less than $264.

  • Are there last-minute flights available from St. Louis to Washington, D.C. for under $200?

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

  • What are the cheapest airlines flying from St. Louis to Washington, D.C. round-trip?

    Flying on Frontier is currently your cheapest option to Washington, D.C., with prices starting at $138. Additional round-trip tickets that might be worth considering are offered by Spirit Airlines and American Airlines, with the lowest prices starting at $152 and $184, respectively. Frontier is 50% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from St. Louis to Washington, D.C. one-way?

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $69. Users have also found prices from $76 and $94 on Frontier and Delta, respectively.

  • What are the most popular routes from St. Louis to Washington, D.C.?

    The most popular route from St. Louis to Washington, D.C. is Lambert-St Louis - Washington, D.C. Reagan-National. You may also consider Lambert-St Louis - Washington, D.C. Dulles Intl or Lambert-St Louis - Baltimore/Washington.

  • What are the most popular airlines that fly from St. Louis to Washington, D.C.?

    American Airlines, Delta and United Airlines are the most popular airlines when flying from St. Louis to Washington, D.C..

  • What are the most reliable airlines from St. Louis to Washington, D.C.?

    The top 3 most reliable airlines when flying from St. Louis to Washington, D.C. are Avianca (98%), Copa Airlines (98%) and GoJet (96%).

  • What are the cheapest flights from St. Louis to Washington, D.C.?

    While on average a flight from St. Louis to Washington, D.C. is generally $1,180, our data shows the cheapest flight currently is $137. When looking at the most popular route, (Lambert-St Louis - Washington, D.C. Reagan-National), you can expect to pay $168 for that flight.

  • What does STL to IAD mean?

    STL and IAD are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. STL to IAD refers to a flight route from Lambert-St Louis Airport to Washington, D.C. Dulles Intl Airport. Baltimore/Washington Airport (BWI), Washington, D.C. Reagan-National Airport (DCA) are some additional IATA codes for airports related to your trip.

  • Can I find deals for flights from St. Louis to Washington, D.C. that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Washington, D.C. 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 St. Louis to Washington, D.C. with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Washington, D.C. 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 St. Louis to Washington, D.C. that include hotel bookings?

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

  • How can I find direct flights from St. Louis to Washington, D.C.?

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

  • Can I find deals for business class flights from St. Louis to Washington, D.C.?

    Yes. Cheapflights offers flight deals from St. Louis to Washington, D.C. 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 St. Louis to Washington, D.C. that allow pets onboard?

    Many airlines flying from St. Louis to Washington, D.C. 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 St. Louis to Washington, D.C.?

    Yes, you can often find last-minute deals on St. Louis to Washington, D.C. 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 St. Louis to Washington, D.C. flight deals updated?

    The St. Louis to Washington, D.C. flight deals you see on this page were last updated on 5/3.

See more FAQs

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Alternative routes for St. Louis to Washington, D.C.
See prices for flight routes from nearby airports that may be better suited for you.

St. Louis to Reagan-National flights
St. Louis to Dulles Intl flights
Kansas City to Reagan-National flights
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Top 5 airlines flying from St. Louis to Washington, D.C.

Discover the top 5 airlines that operate flights from St. Louis to Washington, D.C.. 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 2,864,334 searches. Data last updated May 4, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$102Average$201FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$140Average$224FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
DeltaCheapest$167Average$309FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$191Average$350FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$197Average$379FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
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Search flights from St. Louis to Washington, D.C. by cabin class

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

Find hourly flight availability from St. Louis to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 4, 2024.
9%of flight departuresEarly morningMidnight to 6 am
56%of flight departuresMorning6 am to noon
25%of flight departuresAfternoonNoon to 6 pm
10%of flight departuresEvening6 pm to midnight
Midnight
6 AM
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6 PM

Weekly flight availability from St. Louis to Washington, D.C.

Explore weekly flight availability from St. Louis to Washington, D.C.. 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 May 4, 2024.
Sunday10daily flights
Monday13daily flights
Tuesday12daily flights
Wednesday13daily flights
Thursday12daily flights
Friday13daily flights
Saturday10daily flights

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Need flexible booking options for your flight to Washington, D.C. from St. Louis? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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