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Cheap flights from St. Louis (STL) to Idaho from $124

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 5/20. 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 — BOI
May 13 — May 201
From?
To?
Mon 5/13
Mon 5/20
1 adult, Economy
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How far in advance should I book a flight from St. Louis to Idaho?

Users have found that booking a flight from St. Louis to Idaho at least 18 days early can save you up to 119% on average compared to booking a flight this week. If booking 18 days before your flight isn’t an option for you, users have found flights from St. Louis to Idaho for as little as $379 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $773 for flights departing within the next 3 days.

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

Flights from St. Louis to Idaho lean towards being more expensive in March. Prices are generally better when you fly from St. Louis to Idaho in January, with the cheapest ticket starting at $298.

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

When flying from St. Louis to Idaho, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap Spirit Airlines flights from St. Louis to Idaho

Explore cheap flight options specifically provided by Spirit Airlines for the route between St. Louis and Idaho. 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 2,752,338 searches. Data last updated May 8, 2024.
Consider these cheap Spirit Airlines flights we've found departing from St. Louis to Idaho. Be sure to come back soon if the deals available don't appeal to you at this time.
Mon 5/204:05 pmSTL - BOI
1 stop25h 25mSpirit Airlines
Tue 5/219:15 pmBOI - STL
1 stop12h 31mSpirit Airlines
Deal found 5/7$188
Wed 6/261:55 pmSTL - BOI
1 stop7h 15mSpirit Airlines
Tue 7/25:39 pmBOI - STL
1 stop18h 26mSpirit Airlines
Deal found 5/7$217
Mon 6/102:41 pmSTL - BOI
1 stop26h 58mSpirit Airlines
Mon 6/177:19 pmBOI - STL
3 stops18h 04mSpirit Airlines
Deal found 5/7$315
Thu 8/18:49 pmSTL - BOI
2 stops25h 48mSpirit Airlines
Tue 8/611:09 pmBOI - STL
1 stop14h 08mSpirit Airlines
Deal found 5/6$408
Sat 6/86:22 pmSTL - BOI
2 stops27h 01mSpirit Airlines
Sat 6/151:43 pmBOI - STL
3 stops25h 49mSpirit Airlines
Deal found 5/7$413
Sat 6/811:34 amSTL - BOI
3 stops33h 49mSpirit Airlines
Sat 6/151:43 pmBOI - STL
3 stops25h 49mSpirit Airlines
Deal found 5/7$445
Tue 5/142:35 pmSTL - BOI
3 stops26h 55mSpirit Airlines
Fri 5/1710:54 amBOI - STL
2 stops28h 31mSpirit Airlines
Deal found 5/7$619
Thu 5/166:19 pmSTL - BOI
3 stops27h 06mSpirit Airlines
Sun 5/198:50 pmBOI - STL
1 stop17h 24mSpirit Airlines
Deal found 5/8$683

Cheap American Airlines flights from St. Louis to Idaho

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Idaho. 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 2,752,338 searches. Data last updated May 8, 2024.
Take a gander at the lowest prices we've found on American Airlines flights from St. Louis to Idaho. Deals are refreshing constantly so come back soon for more options.
Wed 5/296:18 pmSTL - GEG
1 stop6h 55mAmerican Airlines
Wed 6/510:33 pmGEG - STL
1 stop8h 00mAmerican Airlines
Deal found 5/7$302
Wed 6/55:27 amSTL - BOI
1 stop6h 33mAmerican Airlines
Wed 6/123:33 pmBOI - STL
1 stop6h 24mAmerican Airlines
Deal found 5/7$304
Sat 6/223:27 pmSTL - GEG
1 stop7h 49mAmerican Airlines
Wed 6/2610:33 pmGEG - STL
1 stop8h 00mAmerican Airlines
Deal found 5/7$332
Fri 9/205:54 amSTL - BOI
1 stop7h 37mAmerican Airlines
Sun 9/297:31 amBOI - STL
1 stop5h 37mAmerican Airlines
Deal found 5/6$355
Thu 6/203:27 pmSTL - GEG
1 stop7h 49mAmerican Airlines
Sun 6/236:37 amGEG - STL
1 stop8h 44mAmerican Airlines
Deal found 5/8$374
Tue 5/282:43 pmSTL - GEG
1 stop8h 40mAmerican Airlines
Fri 5/3112:40 pmGEG - STL
1 stop8h 19mAmerican Airlines
Deal found 5/7$385
Sat 6/89:44 amSTL - BOI
1 stop5h 59mAmerican Airlines
Sat 6/153:33 pmBOI - STL
1 stop6h 24mAmerican Airlines
Deal found 5/7$386
Wed 5/226:18 pmSTL - GEG
1 stop6h 55mAmerican Airlines
Tue 5/2812:42 pmGEG - STL
1 stop8h 17mAmerican Airlines
Deal found 5/7$395
Tue 5/147:01 amSTL - BOI
1 stop6h 44mAmerican Airlines
Fri 5/171:35 pmBOI - STL
1 stop8h 24mAmerican Airlines
Deal found 5/7$687

Cheap St. Louis to Idaho flights in May & June 2024

Find cheap flight options from St. Louis to Idaho specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,752,338 searches. Prices were last updated on May 8, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Idaho in 2024. For more flight deals, be sure to check back very soon.
Wed 5/1511:36 amSTL - BOI
1 stop9h 20mMultiple Airlines
Sun 5/196:15 pmBOI - STL
1 stop19h 59mMultiple Airlines
Deal found 5/7$167
Mon 5/204:05 pmSTL - BOI
1 stop25h 25mSpirit Airlines
Tue 5/219:15 pmBOI - STL
1 stop12h 31mSpirit Airlines
Deal found 5/7$188
Wed 6/261:55 pmSTL - BOI
1 stop7h 15mSpirit Airlines
Tue 7/25:39 pmBOI - STL
1 stop18h 26mSpirit Airlines
Deal found 5/7$217
Wed 6/51:55 pmSTL - BOI
1 stop7h 15mMultiple Airlines
Wed 6/129:13 pmBOI - STL
3 stops18h 02mMultiple Airlines
Deal found 5/7$246
Wed 5/1511:36 amSTL - BOI
1 stop9h 20mMultiple Airlines
Sun 5/1912:15 pmBOI - STL
2 stops25h 59mMultiple Airlines
Deal found 5/7$289
Wed 5/296:18 pmSTL - GEG
1 stop6h 55mAmerican Airlines
Wed 6/510:33 pmGEG - STL
1 stop8h 00mAmerican Airlines
Deal found 5/7$302
Wed 5/296:18 pmSTL - GEG
1 stop6h 55mAmerican Airlines
Fri 5/313:20 pmGEG - STL
1 stop6h 36mAmerican Airlines
Deal found 5/7$304
Wed 6/55:27 amSTL - BOI
1 stop6h 33mAmerican Airlines
Wed 6/123:33 pmBOI - STL
1 stop6h 24mAmerican Airlines
Deal found 5/7$304
Fri 5/174:05 pmSTL - BOI
1 stop29h 20mMultiple Airlines
Sun 5/196:15 pmBOI - STL
1 stop19h 59mMultiple Airlines
Deal found 5/7$312

St. Louis to Idaho 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Idaho in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated May 8, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Idaho in 2024. For more flight deals, be sure to check back very soon.
Wed 5/1511:36 amSTL - BOI
1 stop9h 20mMultiple Airlines
Sun 5/196:15 pmBOI - STL
1 stop19h 59mMultiple Airlines
Deal found 5/7$167
Mon 5/204:05 pmSTL - BOI
1 stop25h 25mSpirit Airlines
Tue 5/219:15 pmBOI - STL
1 stop12h 31mSpirit Airlines
Deal found 5/7$188
Wed 6/261:55 pmSTL - BOI
1 stop7h 15mSpirit Airlines
Tue 7/25:39 pmBOI - STL
1 stop18h 26mSpirit Airlines
Deal found 5/7$217
Wed 6/51:55 pmSTL - BOI
1 stop7h 15mMultiple Airlines
Wed 6/129:13 pmBOI - STL
3 stops18h 02mMultiple Airlines
Deal found 5/7$246
Wed 5/1511:36 amSTL - BOI
1 stop9h 20mMultiple Airlines
Sun 5/1912:15 pmBOI - STL
2 stops25h 59mMultiple Airlines
Deal found 5/7$289
Wed 5/296:18 pmSTL - GEG
1 stop6h 55mAmerican Airlines
Wed 6/510:33 pmGEG - STL
1 stop8h 00mAmerican Airlines
Deal found 5/7$302
Wed 5/296:18 pmSTL - GEG
1 stop6h 55mAmerican Airlines
Fri 5/313:20 pmGEG - STL
1 stop6h 36mAmerican Airlines
Deal found 5/7$304
Wed 6/55:27 amSTL - BOI
1 stop6h 33mAmerican Airlines
Wed 6/123:33 pmBOI - STL
1 stop6h 24mAmerican Airlines
Deal found 5/7$304
Fri 5/174:05 pmSTL - BOI
1 stop29h 20mMultiple Airlines
Sun 5/196:15 pmBOI - STL
1 stop19h 59mMultiple Airlines
Deal found 5/7$312

St. Louis to Idaho flights leaving soon

Find last-minute flight options from St. Louis to Idaho 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 2,752,338 searches. Data last updated May 8, 2024.
Users seeking a last-minute flight from St. Louis to Idaho should consider booking one of these fares. Users should be sure to double check the price, date, and time of their last-minute flight.
Wed 5/1511:36 amSTL - BOI
1 stop9h 20mMultiple Airlines
Sun 5/196:15 pmBOI - STL
1 stop19h 59mMultiple Airlines
Deal found 5/7$167
Wed 5/1511:36 amSTL - BOI
1 stop9h 20mMultiple Airlines
Sun 5/1912:15 pmBOI - STL
2 stops25h 59mMultiple Airlines
Deal found 5/7$289
Fri 5/174:05 pmSTL - BOI
1 stop29h 20mMultiple Airlines
Sun 5/196:15 pmBOI - STL
1 stop19h 59mMultiple Airlines
Deal found 5/7$312
Wed 5/1511:36 amSTL - BOI
1 stop9h 20mMultiple Airlines
Sun 5/196:15 pmBOI - STL
3 stops17h 35mMultiple Airlines
Deal found 5/7$317
Fri 5/174:05 pmSTL - BOI
2 stops22h 34mMultiple Airlines
Sun 5/196:15 pmBOI - STL
1 stop19h 59mMultiple Airlines
Deal found 5/7$408
Tue 5/142:35 pmSTL - BOI
3 stops30h 21mMultiple Airlines
Wed 5/225:20 pmBOI - STL
3 stops21h 55mMultiple Airlines
Deal found 5/7$464
Fri 5/174:45 pmSTL - BOI
3 stops28h 40mMultiple Airlines
Sun 5/196:15 pmBOI - STL
3 stops17h 35mMultiple Airlines
Deal found 5/7$468
Thu 5/167:30 pmSTL - BOI
3 stops25h 55mMultiple Airlines
Sun 5/196:15 pmBOI - STL
1 stop19h 59mMultiple Airlines
Deal found 5/7$476
Tue 5/142:35 pmSTL - BOI
3 stops30h 21mMultiple Airlines
Fri 5/179:15 pmBOI - STL
3 stops32h 45mMultiple Airlines
Deal found 5/7$509

One-way flights to Idaho from St. Louis

Search for one-way flight options from St. Louis to Idaho. 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 2,752,338 searches. Data last updated May 8, 2024.
Take a look at some of the best available options we've come across on one-way flights from St. Louis to Idaho. Users can also find round-trip St. Louis to Idaho flights by using the search form above.
Mon 5/204:05 pmSTL - BOI
1 stop29h 20mSpirit Airlines
Deal found 5/8$124
Sat 6/111:39 amSTL - BOI
3 stops33h 21mSpirit Airlines
Deal found 5/7$146
Sat 8/104:18 pmSTL - GEG
1 stop6h 17mAmerican Airlines
Deal found 5/7$153
Fri 5/174:05 pmSTL - BOI
1 stop24h 59mSpirit Airlines
Deal found 5/7$157
Sat 6/15:30 pmSTL - BOI
1 stop6h 35mDelta
Deal found 5/7$158
Fri 5/174:45 pmSTL - BOI
3 stops28h 40mMultiple Airlines
Deal found 5/7$180
Sun 7/286:15 amSTL - GEG
1 stop5h 40mDelta
Deal found 5/7$188
Tue 5/212:36 pmSTL - GEG
2 stops10h 23mAlaska Airlines
Deal found 5/7$243
Tue 6/112:36 pmSTL - IDA
1 stop10h 21mAlaska Airlines
Deal found 5/7$252

Find flights from St. Louis to Idaho within your budget

Customize your flight search to find flights from St. Louis to Idaho 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 2,752,338 searches. Data last updated May 8, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$188 - $366

Route

Depart

Return

Price

Lambert-St LouisBoise Air Term. Gowen Fld

STL - BOI

STLBOI

Lambert-St Louis

Mon 5/20

1 stop25h 25m

Boise Air Term. Gowen Fld

Tue 5/21

1 stop12h 31m

$188

Lambert-St LouisBoise Air Term. Gowen Fld

STL - BOI

STLBOI

Lambert-St Louis

Wed 6/26

1 stop7h 15m

Boise Air Term. Gowen Fld

Tue 7/2

1 stop18h 26m

$217

Lambert-St LouisBoise Air Term. Gowen Fld

STL - BOI

STLBOI

Lambert-St Louis

Wed 6/5

1 stop7h 15m

Boise Air Term. Gowen Fld

Wed 6/12

3 stops18h 02m

$246

Lambert-St LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Wed 5/29

1 stop6h 55m

Spokane

Wed 6/5

1 stop8h 00m

$302

Lambert-St LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Wed 5/29

1 stop6h 55m

Spokane

Fri 5/31

1 stop6h 36m

$304

Lambert-St LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Wed 9/4

1 stop5h 37m

Spokane

Sat 9/7

1 stop6h 24m

$314

Lambert-St LouisLewiston Nez Perce Rgnl

STL - LWS

STLLWS

Lambert-St Louis

Fri 8/23

2 stops28h 01m

Lewiston Nez Perce Rgnl

Tue 8/27

1 stop7h 06m

$315

Lambert-St LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Wed 5/29

1 stop6h 18m

Spokane

Sun 6/2

1 stop8h 26m

$350

Lambert-St LouisLewiston Nez Perce Rgnl

STL - LWS

STLLWS

Lambert-St Louis

Fri 8/23

1 stop7h 28m

Lewiston Nez Perce Rgnl

Tue 8/27

1 stop5h 08m

$366

Flights are sorted by cheapest first

Deals found on 5/7

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated May 8, 2024.
Read through reviews of airlines operating flights from St. Louis to Idaho, such as Spirit Airlines, American Airlines and Delta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,141 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.3

Entertainment

7.3

Comfort

7.9

Overall

8.1

Reviews

1 / 10

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

Alaska Airlines
8.1
Very good
9,141 reviews
Alaska Airlines
8.1
Very good
9,141 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.3

Entertainment

7.3

Comfort

7.9

Overall

8.1

Reviews

1 / 10

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

Delta
8.1
Very good
10,789 reviews
Alaska Airlines
8.1
Very good
9,141 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.3

Entertainment

7.3

Comfort

7.9

Overall

8.1

Reviews

1 / 10

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

United Airlines
7.4
Good
11,043 reviews
Alaska Airlines
8.1
Very good
9,141 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.3

Entertainment

7.3

Comfort

7.9

Overall

8.1

Reviews

1 / 10

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

American Airlines
7.3
Good
14,677 reviews
Alaska Airlines
8.1
Very good
9,141 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.3

Entertainment

7.3

Comfort

7.9

Overall

8.1

Reviews

1 / 10

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

Spirit Airlines
6.4
Okay
8,706 reviews
Alaska Airlines
8.1
Very good
9,141 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.3

Entertainment

7.3

Comfort

7.9

Overall

8.1

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 Idaho. 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 Idaho?

    For a flight from St. Louis to Idaho, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city.

  • Can I find flights from St. Louis to Idaho for under $200 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Idaho for under $200. The cheapest flight booked recently is on Spirit Airlines for just $188, but on average you can expect to pay $313.

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

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

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

    The cheapest airlines for a one-way flight from St. Louis to Idaho are Spirit Airlines ($124), American Airlines ($153), and Delta ($158).

  • What are the most popular routes from St. Louis to Idaho?

    The most popular route from St. Louis to Idaho is Lambert-St Louis - Spokane. You may also consider Lambert-St Louis - Idaho Falls Fanning Field or Lambert-St Louis - Boise Air Term. Gowen Fld.

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

    When booking a flight from St. Louis to Idaho, you may want to consider flying on American Airlines, Alaska Airlines or Delta as they are the most popular for this route.

  • What does STL to BOI mean?

    STL and BOI 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 BOI refers to a flight route from Lambert-St Louis Airport to Boise Air Term. Gowen Fld Airport. Idaho Falls Fanning Field Airport (IDA), Hailey Sun Valley-Friedman Airport (SUN), Lewiston Nez Perce Rgnl Airport (LWS), Pocatello Airport (PIH), Twin Falls Joslin Airport (TWF) are other airports near this flight route and their unique identifiers/IATA codes.

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

    The amount of baggage you can bring on your St. Louis to Idaho 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 Idaho with specific airlines?

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Idaho 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 Idaho that allow pets onboard?

    Many airlines flying from St. Louis to Idaho 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 Idaho?

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

    The St. Louis to Idaho flight deals you see on this page were last updated on 5/7.

See more FAQs

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Alternative routes for St. Louis to Idaho
See prices for flight routes from nearby airports that may be better suited for you.

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Top 5 airlines flying from St. Louis to Idaho

Discover the top 5 airlines that operate flights from St. Louis to Idaho. 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 2,752,338 searches. Data last updated May 8, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$197Average$254FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
DeltaCheapest$296Average$619FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Alaska AirlinesCheapest$304Average$388FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
American AirlinesCheapest$307Average$549FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$316Average$656FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
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Search flights from St. Louis to Idaho by cabin class

Find flights from St. Louis to Idaho, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
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Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Idaho from St. Louis today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Idaho?

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 Idaho from St. Louis.

Can Cheapflights find flights from St. Louis to Idaho with no change fees?

Yes! Cheapflights helps users easily find flights from St. Louis to Idaho with no change fees.

Can Cheapflights notify me if prices for flights from St. Louis to Idaho become cheaper?

Yes, Cheapflights offers price alerts on St. Louis to Idaho flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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