$99+ Cheap flights from St. Louis to Boise (STL - BOI)
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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BOI
Mar 8 — Mar 151
1 adult, Economy
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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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Best
Last-minute
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Cheapest flights from St. Louis to BoiseExplore the most affordable flight options available from St. Louis to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 6, 2026.
Explore the most affordable flight options available from St. Louis to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 6, 2026.
This Delta deal was found by Cheapflights users on 2/4. 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 3/103:05 pm
STL
- BOI
1 stop7h 04m
Delta
Sat 3/283:01 pm
BOI
- STL
1 stop7h 24m
Delta
Deal found 2/4![Delta logo]()
$197
This Delta deal was found by Cheapflights users on 2/4. 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 4/16:29 am
STL
- BOI
1 stop8h 36m
Delta
Mon 4/66:15 pm
BOI
- STL
1 stop5h 06m
Delta
Deal found 2/4![Delta logo]()
$261
This United Airlines deal was found by Cheapflights users on 2/4. 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 3/1011:25 am
STL
- BOI
2 stops11h 04m
United Airlines
Sat 3/285:31 pm
BOI
- STL
1 stop5h 03m
United Airlines
Deal found 2/4![United Airlines logo]()
$262
This Southwest deal was found by Cheapflights users on 2/5. 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 3/310:35 am
STL
- BOI
1 stop5h 45m
Southwest
Fri 3/67:30 am
BOI
- STL
1 stop10h 20m
Southwest
Deal found 2/5![Southwest logo]()
$266
This Alaska Airlines deal was found by Cheapflights users on 2/6. 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.
Tue 3/107:00 am
STL
- BOI
1 stop9h 08m
Alaska Airlines
Mon 3/166:00 pm
BOI
- STL
1 stop18h 51m
Alaska Airlines
Deal found 2/6![Alaska Airlines logo]()
$281
This United Airlines deal was found by Cheapflights users on 2/5. 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 3/36:25 am
STL
- BOI
2 stops8h 13m
United Airlines
Fri 3/62:40 pm
BOI
- STL
1 stop5h 01m
United Airlines
Deal found 2/5![United Airlines logo]()
$286
This Delta deal was found by Cheapflights users on 2/5. 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.
Sun 4/52:12 pm
STL
- BOI
2 stops10h 33m
Delta
Sat 4/116:00 am
BOI
- STL
1 stop7h 43m
Delta
Deal found 2/5![Delta logo]()
$296
This Southwest deal was found by Cheapflights users on 2/5. 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.
Wed 4/16:40 am
STL
- BOI
1 stop8h 50m
Southwest
Sun 4/54:25 pm
BOI
- STL
2 stops8h 05m
Southwest
Deal found 2/5![Southwest logo]()
$320
This Delta deal was found by Cheapflights users on 2/4. 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 4/176:45 pm
STL
- BOI
1 stop6h 12m
Delta
Mon 4/2711:35 pm
BOI
- STL
1 stop7h 55m
Delta
Deal found 2/4![Delta logo]()
$325
This Expedia deal was found by Cheapflights users on 2/6. 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.
Tue 3/247:00 am
STL
- BOI
2 stops15h 59m
Alaska Airlines
Sun 4/52:22 pm
BOI
- STL
1 stop8h 37m
Alaska Airlines
Deal found 2/6![Alaska Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 2/4. 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 4/242:20 pm
STL
- BOI
2 stops9h 04m
Delta
Mon 4/277:24 am
BOI
- STL
2 stops9h 02m
Delta
Deal found 2/4![Delta logo]()
$334
Best flights from St. Louis to BoiseDiscover carefully curated flight deals from St. Louis to Boise that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 6, 2026.
Discover carefully curated flight deals from St. Louis to Boise that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 6, 2026.
This Delta deal was found by Cheapflights users on 2/4. 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 3/103:05 pm
STL
- BOI
1 stop7h 04m
Delta
Sat 3/283:01 pm
BOI
- STL
1 stop7h 24m
Delta
Deal found 2/4![Delta logo]()
$197
This Southwest deal was found by Cheapflights users on 2/5. 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 3/310:35 am
STL
- BOI
1 stop5h 45m
Southwest
Fri 3/67:30 am
BOI
- STL
1 stop10h 20m
Southwest
Deal found 2/5![Southwest logo]()
$266
This Alaska Airlines deal was found by Cheapflights users on 2/6. 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.
Tue 3/107:00 am
STL
- BOI
1 stop9h 08m
Alaska Airlines
Mon 3/166:00 pm
BOI
- STL
1 stop18h 51m
Alaska Airlines
Deal found 2/6![Alaska Airlines logo]()
$281
This United Airlines deal was found by Cheapflights users on 2/6. 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 3/245:15 am
STL
- BOI
1 stop5h 51m
United Airlines
Sun 4/56:15 am
BOI
- STL
1 stop5h 53m
United Airlines
Deal found 2/6![United Airlines logo]()
$281
This Delta deal was found by Cheapflights users on 2/4. 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.
Sun 4/56:12 pm
STL
- BOI
1 stop6h 47m
Delta
Sat 4/118:00 am
BOI
- STL
1 stop5h 43m
Delta
Deal found 2/4![Delta logo]()
$261
This Delta deal was found by Cheapflights users on 2/5. 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 4/16:12 pm
STL
- BOI
1 stop4h 59m
Delta
Sun 4/56:00 am
BOI
- STL
1 stop6h 17m
Delta
Deal found 2/5![Delta logo]()
$261
This Delta deal was found by Cheapflights users on 2/4. 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 3/96:29 am
STL
- BOI
1 stop8h 35m
Delta
Sat 3/283:01 pm
BOI
- STL
1 stop7h 24m
Delta
Deal found 2/4![Delta logo]()
$261
This Southwest deal was found by Cheapflights users on 2/5. 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.
Wed 4/16:40 am
STL
- BOI
1 stop8h 50m
Southwest
Sun 4/54:25 pm
BOI
- STL
2 stops8h 05m
Southwest
Deal found 2/5![Southwest logo]()
$320
This CheapOair deal was found by Cheapflights users on 2/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/174:20 pm
STL
- BOI
1 stop7h 37m
Alaska Airlines
Mon 4/272:57 pm
BOI
- STL
1 stop8h 02m
Alaska Airlines
Deal found 2/5![Alaska Airlines logo]()
$325
Last-minute flights from St. Louis to BoiseDiscover last-minute flight deals from St. Louis to Boise. Data last updated February 6, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Boise. Data last updated February 6, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 2/5. 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 3/310:35 am
STL
- BOI
1 stop5h 45m
Southwest
Fri 3/67:30 am
BOI
- STL
1 stop10h 20m
Southwest
Deal found 2/5![Southwest logo]()
$266
This United Airlines deal was found by Cheapflights users on 2/5. 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 3/36:25 am
STL
- BOI
2 stops8h 13m
United Airlines
Fri 3/62:40 pm
BOI
- STL
1 stop5h 01m
United Airlines
Deal found 2/5![United Airlines logo]()
$286
This United Airlines deal was found by Cheapflights users on 2/5. 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.
Thu 3/56:02 pm
STL
- BOI
1 stop5h 41m
United Airlines
Wed 3/116:15 am
BOI
- STL
1 stop6h 04m
United Airlines
Deal found 2/5![United Airlines logo]()
$361
This Alaska Airlines deal was found by Cheapflights users on 2/5. 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.
Thu 3/57:00 am
STL
- BOI
1 stop16h 40m
Alaska Airlines
Wed 3/114:30 pm
BOI
- STL
2 stops20h 21m
Alaska Airlines
Deal found 2/5![Alaska Airlines logo]()
$388
This Delta deal was found by Cheapflights users on 2/4. 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 3/96:29 am
STL
- BOI
1 stop8h 35m
Delta
Sat 3/283:01 pm
BOI
- STL
1 stop7h 24m
Delta
Deal found 2/4![Delta logo]()
$261
This Delta deal was found by Cheapflights users on 2/4. 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 3/103:05 pm
STL
- BOI
1 stop7h 04m
Delta
Sat 3/283:01 pm
BOI
- STL
1 stop7h 24m
Delta
Deal found 2/4![Delta logo]()
$197
This United Airlines deal was found by Cheapflights users on 2/4. 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 3/1011:25 am
STL
- BOI
2 stops11h 04m
United Airlines
Sat 3/285:31 pm
BOI
- STL
1 stop5h 03m
United Airlines
Deal found 2/4![United Airlines logo]()
$262
This Alaska Airlines deal was found by Cheapflights users on 2/6. 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.
Tue 3/107:00 am
STL
- BOI
1 stop9h 08m
Alaska Airlines
Mon 3/166:00 pm
BOI
- STL
1 stop18h 51m
Alaska Airlines
Deal found 2/6![Alaska Airlines logo]()
$281
This Southwest deal was found by Cheapflights users on 2/6. 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 3/106:40 am
STL
- BOI
1 stop8h 50m
Southwest
Mon 3/168:15 pm
BOI
- STL
2 stops14h 25m
Southwest
Deal found 2/6![Southwest logo]()
$343
This Expedia deal was found by Cheapflights users on 2/6. 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.
Tue 3/247:00 am
STL
- BOI
2 stops15h 59m
Alaska Airlines
Sun 4/52:22 pm
BOI
- STL
1 stop8h 37m
Alaska Airlines
Deal found 2/6![Alaska Airlines logo]()
$329
One-way flights from St. Louis to BoiseSearch for one-way flight options from St. Louis to Boise. Find affordable one-way fares based on user searches. Data last updated February 6, 2026.
Search for one-way flight options from St. Louis to Boise. Find affordable one-way fares based on user searches. Data last updated February 6, 2026.
This Delta deal was found by Cheapflights users on 2/6. 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 3/106:29 am
STL
- BOI
1 stop8h 35m
Delta
Deal found 2/6![Delta logo]()
$99
This United Airlines deal was found by Cheapflights users on 2/6. 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 3/106:25 am
STL
- BOI
2 stops8h 07m
United Airlines
Deal found 2/6![United Airlines logo]()
$145
This United Airlines deal was found by Cheapflights users on 2/5. 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 3/95:55 pm
STL
- BOI
1 stop5h 48m
United Airlines
Deal found 2/5![United Airlines logo]()
$163
This American Airlines deal was found by Cheapflights users on 2/5. 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 7/75:45 am
STL
- BOI
1 stop6h 44m
American Airlines
Deal found 2/5![American Airlines logo]()
$184
This American Airlines deal was found by Cheapflights users on 2/5. 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 5/207:05 am
STL
- BOI
1 stop6h 44m
American Airlines
Deal found 2/5![American Airlines logo]()
$187
This Southwest deal was found by Cheapflights users on 2/4. 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 5/96:15 am
STL
- BOI
2 stops8h 55m
Southwest
Deal found 2/4![Southwest logo]()
$191
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Sat 7/114:50 pm
STL
- BOI
1 stop5h 44m
United Airlines
Deal found 2/4![United Airlines logo]()
$206
This Delta deal was found by Cheapflights users on 2/5. 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 3/92:22 pm
STL
- BOI
2 stops10h 22m
Delta
Deal found 2/5![Delta logo]()
$237
This CheapOair deal was found by Cheapflights users on 2/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:21 am
STL
- BOI
2 stops11h 48m
Alaska Airlines
Deal found 2/5![Alaska Airlines logo]()
$239
This Southwest deal was found by Cheapflights users on 2/4. 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 7/118:50 am
STL
- BOI
2 stops9h 30m
Southwest
Deal found 2/4![Southwest logo]()
$269
This Delta deal was found by Cheapflights users on 2/5. 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.
Sun 2/226:40 pm
STL
- BOI
1 stop5h 25m
Delta
Deal found 2/5![Delta logo]()
$274
This CheapOair deal was found by Cheapflights users on 2/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/86:00 am
STL
- BOI
2 stops10h 56m
Alaska Airlines
Deal found 2/6![Alaska Airlines logo]()
$287
Find flight deals from St. Louis to Boise
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Boise (BOI). 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 February 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $197 (Delta) |
One-way from | $99 (Delta) |
Popular in | February |
Cheapest in | November |
Average price | $553 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Boise 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 February 6, 2026.
Use the filters below to find and compare flights from St. Louis to Boise that are best for you.
Fly from
St. Louis
Fly to
Boise
Route
Depart
Return
Price
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
Tue 3/10
3:05 pm-9:09 pm
1 stop7h 04m
Boise Air Term. Gowen Fld
Sat 3/28
3:01 pm-11:25 pm
1 stop7h 24m
$197
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
Sun 4/5
6:12 pm-11:59 pm
1 stop6h 47m
Boise Air Term. Gowen Fld
Sat 4/11
8:00 am-2:43 pm
1 stop5h 43m
$261
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
Wed 4/1
6:12 pm-10:11 pm
1 stop4h 59m
Boise Air Term. Gowen Fld
Sun 4/5
6:00 am-1:17 pm
1 stop6h 17m
$261
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
Mon 3/9
6:29 am-2:04 pm
1 stop8h 35m
Boise Air Term. Gowen Fld
Sat 3/28
3:01 pm-11:25 pm
1 stop7h 24m
$261
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
Tue 3/3
10:35 am-3:20 pm
1 stop5h 45m
Boise Air Term. Gowen Fld
Fri 3/6
7:30 am-6:50 pm
1 stop10h 20m
$266
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
Tue 3/10
7:00 am-3:08 pm
1 stop9h 08m
Boise Air Term. Gowen Fld
Mon 3/16
6:00 pm-1:51 pm
1 stop18h 51m
$281
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
Tue 3/24
5:15 am-10:06 am
1 stop5h 51m
Boise Air Term. Gowen Fld
Sun 4/5
6:15 am-1:08 pm
1 stop5h 53m
$281
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
Wed 4/1
6:40 am-2:30 pm
1 stop8h 50m
Boise Air Term. Gowen Fld
Sun 4/5
4:25 pm-1:30 am
2 stops8h 05m
$320
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
Fri 4/17
4:20 pm-10:57 pm
1 stop7h 37m
Boise Air Term. Gowen Fld
Mon 4/27
2:57 pm-11:59 pm
1 stop8h 02m
$325
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
Tue 3/10
6:29 am-2:04 pm
1 stop8h 35m
$99
Showing 1-10 of 18 results
Compare providers for flights from St. Louis to Boise
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 St. Louis to Boise in February.
| 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 St. Louis-Boise flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Boise flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Boise flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Boise 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 St. Louis-Boise 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 St. Louis to Boise
Have a flexible travel schedule? Discover the best time to fly to Boise from St. Louis with our price prediction graph.
STL-BOI
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 St. Louis to Boise
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How far ahead should I book a flight from St. Louis to Boise?
Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Boise. Price data was last updated on January 30, 2026.
The price you pay for your flight from St. Louis to Boise may vary depending on when you book. For the best chance of a lower fare, look to book 75 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from St. Louis to Boise?
Currently, September is the cheapest month in which you can book a flight from St. Louis to Boise (average of $186). Flying from St. Louis to Boise in January is currently the most expensive (average of $359). 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.
What’s the top layover airport for flights from St. Louis to Boise?
Share of 1-stop round-trip flights from St. Louis to Boise chosen by Cheapflights users in the past 12 months, using the same layover each way.
Denver (DEN) – chosen by Cheapflights users on 80% of 1-stop itineraries from St. Louis to Boise on Cheapflights.
What’s the cheapest layover airport for flights from St. Louis to Boise?
Average round-trip fare for 1-stop flights from St. Louis to Boise, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Seattle (SEA) is the most affordable 1-stop option, with an average round-trip price of $395.
What’s the fastest layover option from St. Louis to Boise?
Shortest average travel time for 1-stop one-way flights from St. Louis to Boise, 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: 5h 10m.
Which airport typically offers the quickest layover for flights from St. Louis to Boise?
Average layover duration for 1-stop one-way flights from St. Louis to Boise, 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 06m.
Reviews of airlines servicing Boise
Get insights into the airlines that provide service to Boise. 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 Boise. Reviews last updated February 6, 2026.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from St. Louis to Boise. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Boise. 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 Boise?
Book flights to Boise if you plan to visit one of these locationsOntario
Meridian
Nampa
Caldwell
McCall
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Top 4 airlines flying from St. Louis to Boise
Discover the top 4 airlines that operate flights from St. Louis to Boise. 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 February 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$186 | Average$366 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$278 | Average$382 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$296 | Average$421 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$338 | Average$476 | FlexibilityNo cancel fee | On-time69% |