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Cheap flights from St. Louis to Boise from $309

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Boise

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:58 pm - 8:54 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
25h 56m2 stops Denver Intl Las Vegas Harry Reid Intl
Frontier Logo
9:51 pm - 1:52 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
15h 01m1 stop Las Vegas Harry Reid Intl
$351Frontier
Wed, Dec 2 - Sun, Dec 6
Alaska Airlines Logo
6:04 am - 2:19 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
9h 15m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:10 pm - 11:59 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
6h 49m1 stop Seattle/Tacoma Intl
$363Alaska Airlines
Thu, Dec 3 - Thu, Dec 3
Delta Logo
7:30 am - 12:17 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
5h 47m1 stop Salt Lake City
Delta Logo
3:22 pm - 11:18 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
6h 56m1 stop Minneapolis St Paul
$369Delta
Wed, Feb 3 - Sat, Feb 6
Delta Logo
7:30 am - 12:17 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
5h 47m1 stop Salt Lake City
Delta Logo
5:40 am - 2:31 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
7h 51m1 stop Minneapolis St Paul
$369Delta
Sat, Jan 30 - Mon, Feb 8
American Airlines Logo
8:00 am - 4:04 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
9h 04m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
7:00 am - 5:09 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
9h 09m1 stop Dallas/Fort Worth
$369American Airlines
Mon, Feb 1 - Mon, Feb 8
American Airlines Logo
8:00 am - 4:04 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
9h 04m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
12:29 pm - 11:57 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
10h 28m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl
$374American Airlines
Mon, Feb 1 - Mon, Feb 8
Southwest Logo
6:35 am - 11:00 amSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
5h 25m1 stop Denver Intl
Southwest Logo
1:45 pm - 11:30 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
8h 45m2 stops Denver Intl Dallas Love Field
$428Southwest
Mon, Jan 11 - Mon, Jan 18
Southwest Logo
6:30 am - 11:00 amSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
5h 30m1 stop Denver Intl
Southwest Logo
12:40 pm - 9:20 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
7h 40m2 stops San Jose Las Vegas Harry Reid Intl
$428Southwest
Thu, Dec 3 - Thu, Dec 3
United Airlines Logo
3:00 pm - 9:35 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
7h 35m1 stop Denver Intl
United Airlines Logo
6:25 am - 6:08 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
10h 43m2 stops Denver Intl Chicago O'Hare Intl
$484United Airlines
Tue, Jan 5 - Wed, Jan 6
United Airlines Logo
1:08 pm - 10:59 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
10h 51m2 stops Chicago O'Hare Intl Denver Intl
United Airlines Logo
2:51 pm - 8:59 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
5h 08m1 stop Denver Intl
$484United Airlines
Tue, Nov 10 - Wed, Nov 11

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American Airlines flights from St. Louis to Boise

Our best American Airlines deals on St. Louis to Boise flight tickets
American Airlines
Feb 1
STL8:00 amLambert-St Louis
9h 04m
1 stop
BOI4:04 pmBoise Air Term. Gowen Fld
Feb 8
BOI12:29 pmBoise Air Term. Gowen Fld
10h 28m
2 stops
STL11:57 pmLambert-St Louis
$374
American Airlines
Jan 11
STL5:29 amLambert-St Louis
8h 15m
1 stop
BOI12:44 pmBoise Air Term. Gowen Fld
Jan 18
BOI7:00 amBoise Air Term. Gowen Fld
9h 09m
1 stop
STL5:09 pmLambert-St Louis
$398
American Airlines
Jan 4
STL4:32 pmLambert-St Louis
9h 00m
1 stop
BOI12:32 amBoise Air Term. Gowen Fld
Jan 11
BOI12:28 pmBoise Air Term. Gowen Fld
10h 29m
2 stops
STL11:57 pmLambert-St Louis
$428

Frontier flights from St. Louis to Boise

Our best Frontier deals on St. Louis to Boise flight tickets
Frontier
Dec 2
STL7:58 pmLambert-St Louis
25h 56m
2 stops
BOI8:54 pmBoise Air Term. Gowen Fld
Dec 6
BOI9:51 pmBoise Air Term. Gowen Fld
15h 01m
1 stop
STL1:52 pmLambert-St Louis
$351
Frontier
Dec 4
STL2:47 pmLambert-St Louis
7h 07m
1 stop
BOI8:54 pmBoise Air Term. Gowen Fld
Dec 6
BOI9:51 pmBoise Air Term. Gowen Fld
15h 01m
1 stop
STL1:52 pmLambert-St Louis
$438
Frontier
Dec 3
STL6:13 pmLambert-St Louis
27h 41m
2 stops
BOI8:54 pmBoise Air Term. Gowen Fld
Dec 6
BOI9:51 pmBoise Air Term. Gowen Fld
15h 01m
1 stop
STL1:52 pmLambert-St Louis
$446

momondo Fare Finder

 
Use the filters below to find and compare flights from St. Louis to Boise that are best for you.

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Route

Depart

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Price

Cheapest round-trip

St. LouisBoise

STL Lambert-St Louis - BOI Boise Air Term. Gowen Fld

STLBOI

Lambert-St Louis

Wed 12/2

7:58 pm-8:54 pm

2 stops25h 56m

Boise Air Term. Gowen Fld

Sun 12/6

9:51 pm-1:52 pm

1 stop15h 01m

$351

St. LouisBoise

STL Lambert-St Louis - BOI Boise Air Term. Gowen Fld

STLBOI

Lambert-St Louis

Thu 12/3

6:04 am-2:19 pm

1 stop9h 15m

Boise Air Term. Gowen Fld

Thu 12/3

4:10 pm-11:59 pm

1 stop6h 49m

$363
Quickest round-trip

St. LouisBoise

STL Lambert-St Louis - BOI Boise Air Term. Gowen Fld

STLBOI

Lambert-St Louis

Wed 2/3

7:30 am-12:17 pm

1 stop5h 47m

Boise Air Term. Gowen Fld

Sat 2/6

3:22 pm-11:18 pm

1 stop6h 56m

$369

St. LouisBoise

STL Lambert-St Louis - BOI Boise Air Term. Gowen Fld

STLBOI

Lambert-St Louis

Sat 1/30

7:30 am-12:17 pm

1 stop5h 47m

Boise Air Term. Gowen Fld

Mon 2/8

5:40 am-2:31 pm

1 stop7h 51m

$369

St. LouisBoise

STL Lambert-St Louis - BOI Boise Air Term. Gowen Fld

STLBOI

Lambert-St Louis

Mon 2/1

8:00 am-4:04 pm

1 stop9h 04m

Boise Air Term. Gowen Fld

Mon 2/8

7:00 am-5:09 pm

1 stop9h 09m

$369

St. LouisBoise

STL Lambert-St Louis - BOI Boise Air Term. Gowen Fld

STLBOI

Lambert-St Louis

Mon 2/1

8:00 am-4:04 pm

1 stop9h 04m

Boise Air Term. Gowen Fld

Mon 2/8

12:29 pm-11:57 pm

2 stops10h 28m

$374

St. LouisBoise

STL Lambert-St Louis - BOI Boise Air Term. Gowen Fld

STLBOI

Lambert-St Louis

Mon 1/11

6:35 am-11:00 am

1 stop5h 25m

Boise Air Term. Gowen Fld

Mon 1/18

1:45 pm-11:30 pm

2 stops8h 45m

$428

St. LouisBoise

STL Lambert-St Louis - BOI Boise Air Term. Gowen Fld

STLBOI

Lambert-St Louis

Thu 12/3

6:30 am-11:00 am

1 stop5h 30m

Boise Air Term. Gowen Fld

Thu 12/3

12:40 pm-9:20 pm

2 stops7h 40m

$428

St. LouisBoise

STL Lambert-St Louis - BOI Boise Air Term. Gowen Fld

STLBOI

Lambert-St Louis

Tue 1/5

3:00 pm-9:35 pm

1 stop7h 35m

Boise Air Term. Gowen Fld

Wed 1/6

6:25 am-6:08 pm

2 stops10h 43m

$484

St. LouisBoise

STL Lambert-St Louis - BOI Boise Air Term. Gowen Fld

STLBOI

Lambert-St Louis

Tue 11/10

1:08 pm-10:59 pm

2 stops10h 51m

Boise Air Term. Gowen Fld

Wed 11/11

2:51 pm-8:59 pm

1 stop5h 08m

$484

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Boise from

How to get the cheapest flight ticket from St. Louis to Boise

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Boise?

Prices are currently typical for flights on this route.

Typical prices usually range from $321 to $457.
The lowest price recently found on this route was $351.

What is the cheapest month to fly to Boise?

The month of January is, on average, the cheapest month to fly to Boise from St. Louis, with most prices found around $359. If you aren’t able to travel during the month of January, then book flights to Boise from St. Louis during October instead. Flights to Boise in October, while not as cheap as those in January, still average around $373.

How have St. Louis to Boise flight prices changed over time?

As of September 2026, prices for St. Louis to Boise flights are approximately 2% cheaper when compared to flights at the same time last year.

When to book flights from St. Louis to Boise

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Boise according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Boise (STL to BOI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Boise

Best Price Found

$309

Fastest flight time

5h 30m

Direct flights

None
The best one-way flight to Boise from St. Louis in the past 72 hours is $309. The best round-trip flight deal from St. Louis to Boise found on momondo in the last 72 hours is $351.
The fastest flight from St. Louis to Boise takes 5h 30m
There are no direct flights from St. Louis to Boise. There are no popular flight routes from St. Louis to Boise.
Search flight deals

Frequently asked questions about flying from St. Louis to Boise

  • How far is Lambert-St Louis to Boise Air Term. Gowen Fld by plane?

    Lambert-St Louis and Boise Air Term. Gowen Fld are 1389.5 mi apart from one another. By plane, this route typically takes 5h 30m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Boise Air Term. Gowen Fld Airport?

    Prices for flights from Lambert-St Louis Airport to Boise Air Term. Gowen Fld Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Boise Air Term. Gowen Fld Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Boise Air Term. Gowen Fld Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Boise Air Term. Gowen Fld Airport.

  • What documentation or ID do you need to fly to Boise Air Term. Gowen Fld Airport?

    The travel and health documents required for your trip to Boise Air Term. Gowen Fld Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Boise Air Term. Gowen Fld Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from St. Louis to Boise?

Best airlines flying from St. Louis to Boise

Compare and see reviews for airlines that fly from St. Louis to Boise with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $207Free CancellationRating
7.0
12,097 reviews
Search American Airlines flights
DeltaPriceFrom $237Free CancellationRating
7.8
8,605 reviews
Search Delta flights
SouthwestPriceFrom $336Free CancellationRating
8.0
4,202 reviews
Search Southwest flights
United AirlinesPriceFrom $350Free CancellationRating
7.4
10,245 reviews
Search United Airlines flights

Traveling to a place near Boise?

Book flights to Boise if you plan to visit one of these locations
Nampa
Meridian
Ontario
Caldwell
McCall
Eagle

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Why should I use momondo to find a flight deal from St. Louis to Boise?

It is quick and easy to find St. Louis to Boise flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Boise that suits you.

Can I find flights from St. Louis to Boise with flexible booking policies on momondo?

Flights from St. Louis to Boise with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Boise?

momondo provides multiple filters to help you find the best flight to Boise from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from St. Louis to Boise right now. Can momondo alert me if prices change?

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