$103+ Cheap flights from Boise to St. Louis (BOI - STL)
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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — STL
May 23 — May 301
Round-trip
1 adult, Economy
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Find cheap flights from Boise to St. Louis with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Boise to St. Louis
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Cheapest flights from Boise to St. LouisExplore the most affordable flight options available from Boise to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.
Explore the most affordable flight options available from Boise to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.
This American Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/274:05 pm
BOI
- STL
1 stop6h 54m
American Airlines
Fri 5/298:36 am
STL
- BOI
1 stop7h 31m
American Airlines
Deal found 4/21![American Airlines logo]()
$317
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1911:39 pm
BOI
- STL
1 stop9h 05m
Delta
Tue 5/267:59 pm
STL
- BOI
1 stop5h 05m
Delta
Deal found 4/22![Delta logo]()
$322
This United Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:44 pm
BOI
- STL
1 stop5h 06m
United Airlines
Wed 9/25:10 am
STL
- BOI
1 stop5h 25m
United Airlines
Deal found 4/20![United Airlines logo]()
$353
This American Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/103:11 pm
BOI
- STL
1 stop7h 45m
American Airlines
Sat 6/136:00 am
STL
- BOI
1 stop9h 20m
American Airlines
Deal found 4/20![American Airlines logo]()
$354
This Alaska Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/34:19 pm
BOI
- STL
1 stop6h 35m
Alaska Airlines
Sun 6/77:41 pm
STL
- BOI
1 stop16h 22m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$365
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/82:04 pm
BOI
- STL
1 stop7h 10m
Delta
Mon 6/153:57 pm
STL
- BOI
1 stop7h 38m
Delta
Deal found 4/22![Delta logo]()
$381
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/279:16 pm
BOI
- STL
2 stops12h 16m
Delta
Fri 5/295:36 pm
STL
- BOI
1 stop7h 10m
Delta
Deal found 4/21![Delta logo]()
$382
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:25 pm
BOI
- STL
1 stop28h 58m
Frontier
Sat 5/306:30 pm
STL
- BOI
2 stops19h 00m
Frontier
Deal found 4/20![Frontier logo]()
$387
This United Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/225:46 pm
BOI
- STL
1 stop5h 11m
United Airlines
Mon 5/255:10 am
STL
- BOI
1 stop5h 26m
United Airlines
Deal found 4/21![United Airlines logo]()
$392
Best flights from Boise to St. LouisDiscover carefully curated flight deals from Boise to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 23, 2026.
Discover carefully curated flight deals from Boise to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 23, 2026.
This United Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:44 pm
BOI
- STL
1 stop5h 06m
United Airlines
Wed 9/25:10 am
STL
- BOI
1 stop5h 25m
United Airlines
Deal found 4/20![United Airlines logo]()
$353
This Alaska Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/34:19 pm
BOI
- STL
1 stop6h 35m
Alaska Airlines
Sun 6/77:41 pm
STL
- BOI
1 stop16h 22m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$365
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/199:16 pm
BOI
- STL
2 stops12h 16m
Delta
Tue 5/267:59 pm
STL
- BOI
1 stop5h 05m
Delta
Deal found 4/22![Delta logo]()
$375
This Southwest deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/94:05 pm
BOI
- STL
1 stop5h 05m
Southwest
Tue 6/165:35 am
STL
- BOI
2 stops7h 55m
Southwest
Deal found 4/18![Southwest logo]()
$387
This Southwest deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/48:00 am
BOI
- STL
2 stops7h 50m
Southwest
Sat 7/117:35 pm
STL
- BOI
1 stop5h 50m
Southwest
Deal found 4/22![Southwest logo]()
$450
This Delta deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/211:35 am
BOI
- STL
1 stop5h 25m
Delta
Sun 10/46:30 am
STL
- BOI
1 stop8h 33m
Delta
Deal found 4/18![Delta logo]()
$467
This Southwest deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/47:00 am
BOI
- STL
2 stops8h 50m
Southwest
Sun 7/127:35 pm
STL
- BOI
1 stop6h 45m
Southwest
Deal found 4/20![Southwest logo]()
$458
This Southwest deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/56:25 am
BOI
- STL
2 stops9h 50m
Southwest
Sat 10/106:35 am
STL
- BOI
1 stop5h 15m
Southwest
Deal found 4/20![Southwest logo]()
$461
This Southwest deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/184:25 pm
BOI
- STL
2 stops7h 10m
Southwest
Fri 6/197:45 pm
STL
- BOI
1 stop6h 20m
Southwest
Deal found 4/22![Southwest logo]()
$461
This Southwest deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/83:25 pm
BOI
- STL
2 stops7h 45m
Southwest
Mon 6/156:40 pm
STL
- BOI
2 stops8h 05m
Southwest
Deal found 4/22![Southwest logo]()
$472
Last-minute flights from Boise to St. LouisDiscover last-minute flight deals from Boise to St. Louis. Data last updated April 23, 2026 and is based on user searches.
Discover last-minute flight deals from Boise to St. Louis. Data last updated April 23, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/124:05 pm
BOI
- STL
1 stop6h 10m
Southwest
Tue 5/196:30 pm
STL
- BOI
1 stop6h 55m
Southwest
Deal found 4/18![Southwest logo]()
$393
This Southwest deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1611:00 am
BOI
- STL
2 stops8h 25m
Southwest
Wed 5/202:30 pm
STL
- BOI
1 stop10h 55m
Southwest
Deal found 4/20![Southwest logo]()
$404
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1911:39 pm
BOI
- STL
1 stop9h 05m
Delta
Tue 5/267:59 pm
STL
- BOI
1 stop5h 05m
Delta
Deal found 4/22![Delta logo]()
$322
This Expedia deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/204:19 pm
BOI
- STL
1 stop6h 35m
Alaska Airlines
Sun 5/245:33 pm
STL
- BOI
1 stop7h 25m
Alaska Airlines
Deal found 4/22![Alaska Airlines logo]()
$408
This United Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/225:46 pm
BOI
- STL
1 stop5h 11m
United Airlines
Mon 5/255:10 am
STL
- BOI
1 stop5h 26m
United Airlines
Deal found 4/21![United Airlines logo]()
$392
This American Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/274:05 pm
BOI
- STL
1 stop6h 54m
American Airlines
Fri 5/298:36 am
STL
- BOI
1 stop7h 31m
American Airlines
Deal found 4/21![American Airlines logo]()
$317
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/279:16 pm
BOI
- STL
2 stops12h 16m
Delta
Fri 5/295:36 pm
STL
- BOI
1 stop7h 10m
Delta
Deal found 4/21![Delta logo]()
$382
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:25 pm
BOI
- STL
1 stop28h 58m
Frontier
Sat 5/306:30 pm
STL
- BOI
2 stops19h 00m
Frontier
Deal found 4/20![Frontier logo]()
$387
This American Airlines deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/303:11 pm
BOI
- STL
1 stop7h 43m
American Airlines
Sun 5/315:25 am
STL
- BOI
1 stop6h 54m
American Airlines
Deal found 4/18![American Airlines logo]()
$432
One-way flights from Boise to St. LouisSearch for one-way flight options from Boise to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 23, 2026.
Search for one-way flight options from Boise to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/261:25 pm
BOI
- STL
1 stop28h 58m
Frontier
Deal found 4/22![Frontier logo]()
$103
This Priceline deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/161:04 pm
BOI
- STL
1 stop5h 19m
Frontier
Deal found 4/18![Frontier logo]()
$125
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/86:42 pm
BOI
- STL
1 stop4h 57m
Delta
Deal found 4/21![Delta logo]()
$159
This Southwest deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/85:55 pm
BOI
- STL
1 stop6h 55m
Southwest
Deal found 4/20![Southwest logo]()
$173
This American Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/264:05 pm
BOI
- STL
1 stop6h 54m
American Airlines
Deal found 4/21![American Airlines logo]()
$192
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/269:16 pm
BOI
- STL
2 stops12h 16m
Delta
Deal found 4/21![Delta logo]()
$197
This deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/95:46 pm
BOI
- STL
1 stop5h 11m
United Airlines
Deal found 4/21![United Airlines logo]()
$207
This United Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/87:05 pm
BOI
- STL
2 stops12h 36m
United Airlines
Deal found 4/21![United Airlines logo]()
$209
Find flight deals from Boise to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Boise (BOI) 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 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $317 (American Airlines) |
One-way from | $103 (Kiwi.com) |
Popular in | November |
Cheapest in | September |
Average price | $449 |
Cheapflights Fare Finder
Customize your flight search to find flights from Boise 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 2,558,603 searches. Data last updated April 23, 2026.
Use the filters below to find and compare flights from Boise to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Tue 9/1
5:44 pm-11:50 pm
1 stop5h 06m
Lambert-St Louis
Wed 9/2
5:10 am-9:35 am
1 stop5h 25m
$353
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Wed 6/3
4:19 pm-11:54 pm
1 stop6h 35m
Lambert-St Louis
Sun 6/7
7:41 pm-11:03 am
1 stop16h 22m
$365
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Tue 5/19
9:16 pm-10:32 am
2 stops12h 16m
Lambert-St Louis
Tue 5/26
7:59 pm-12:04 am
1 stop5h 05m
$375
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Tue 6/9
4:05 pm-10:10 pm
1 stop5h 05m
Lambert-St Louis
Tue 6/16
5:35 am-12:30 pm
2 stops7h 55m
$387
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Sat 7/4
8:00 am-4:50 pm
2 stops7h 50m
Lambert-St Louis
Sat 7/11
7:35 pm-12:25 am
1 stop5h 50m
$450
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Sat 7/4
7:00 am-4:50 pm
2 stops8h 50m
Lambert-St Louis
Sun 7/12
7:35 pm-1:20 am
1 stop6h 45m
$458
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Mon 10/5
6:25 am-5:15 pm
2 stops9h 50m
Lambert-St Louis
Sat 10/10
6:35 am-10:50 am
1 stop5h 15m
$461
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Thu 6/18
4:25 pm-12:35 am
2 stops7h 10m
Lambert-St Louis
Fri 6/19
7:45 pm-1:05 am
1 stop6h 20m
$461
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Fri 10/2
11:35 am-6:00 pm
1 stop5h 25m
Lambert-St Louis
Sun 10/4
6:30 am-2:03 pm
1 stop8h 33m
$467
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Mon 6/8
3:25 pm-12:10 am
2 stops7h 45m
Lambert-St Louis
Mon 6/15
6:40 pm-1:45 am
2 stops8h 05m
$472
Showing 1-10 of 19 resultsSorted by cheapest first
Compare providers for flights from Boise to St. Louis
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boise to St. Louis in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Boise-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boise-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boise-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Boise-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boise-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Boise to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Boise with our price prediction graph.
BOI-STL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Boise to St. Louis
Prices
More
How far ahead should I book a flight from Boise to St. Louis?
Use this chart to determine the optimal time to book a round-trip flight from Boise to St. Louis. Price data was last updated on April 17, 2026.
To ensure you get the cheapest price possible for a flight from Boise to St. Louis, you should look to book at least 46 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Boise to St. Louis?
Currently, September is the cheapest month in which you can book a flight from Boise to St. Louis (average of $301). Flying from Boise to St. Louis in November is currently the most expensive (average of $572). 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.
How much does it cost to fly round-trip from Boise to St. Louis?
What’s the top layover airport for flights from Boise to St. Louis?
Share of 1-stop round-trip flights from Boise to St. Louis chosen by Cheapflights users in the past 12 months, using the same layover each way.
Denver (DEN) – chosen by Cheapflights users on 67% of 1-stop itineraries from Boise to St. Louis on Cheapflights.
What’s the cheapest layover airport for flights from Boise to St. Louis?
Average round-trip fare for 1-stop flights from Boise to St. Louis, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $506.
What’s the fastest layover option from Boise to St. Louis?
Shortest average travel time for 1-stop one-way flights from Boise to St. Louis, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 4h 55m.
Which airport typically offers the quickest layover for flights from Boise to St. Louis?
Average layover duration for 1-stop one-way flights from Boise to St. Louis, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 1h 45m.
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 23, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andUnited Airlines from Boise to St. Louis 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.
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Boise to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus
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Top 4 airlines flying from Boise to St. Louis
Discover the top 4 airlines that operate flights from Boise 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 2,558,603 searches. Data last updated April 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$209 | Average$362 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$278 | Average$372 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$281 | Average$484 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$283 | Average$421 | FlexibilityNo cancel fee | On-time69% |