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Cheap flights from Boise to St. Louis from $111

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boise to St. Louis departing on 9/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Boise to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
2:50 pm - 11:17 amBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
19h 27m1 stop Las Vegas Harry Reid Intl
Frontier Logo
12:17 pm - 1:55 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
26h 38m1 stop Las Vegas Harry Reid Intl
$180Frontier
Thu, Sep 10 - Wed, Sep 16
Frontier Logo
2:50 pm - 7:17 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
27h 27m2 stops Las Vegas Harry Reid Intl Denver Intl
Frontier Logo
12:17 pm - 1:55 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
26h 38m1 stop Las Vegas Harry Reid Intl
$202Frontier
Thu, Sep 10 - Wed, Sep 16
Frontier Logo
2:50 pm - 11:17 amBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
19h 27m1 stop Las Vegas Harry Reid Intl
Frontier Logo
12:27 pm - 1:55 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
26h 28m1 stop Las Vegas Harry Reid Intl
$254Frontier
Thu, Sep 10 - Sun, Sep 13
United Airlines Logo
2:51 pm - 8:59 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
5h 08m1 stop Denver Intl
United Airlines Logo
5:00 am - 11:30 amSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
7h 30m1 stop Chicago O'Hare Intl
$264United Airlines
Tue, Nov 10 - Wed, Nov 11
Delta Logo
5:15 am - 2:39 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
8h 24m1 stop Minneapolis St Paul
Delta Logo
5:30 pm - 11:56 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
7h 26m1 stop Minneapolis St Paul
$269Delta
Wed, Nov 18 - Tue, Dec 1
Southwest Logo
3:55 pm - 10:20 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
5h 25m1 stop Denver Intl
Southwest Logo
8:30 am - 3:10 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
7h 40m2 stops Kansas City Denver Intl
$274Southwest
Mon, Nov 9 - Tue, Nov 10
Southwest Logo
6:20 am - 3:20 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
8h 00m2 stops Las Vegas Harry Reid Intl Denver Intl
Southwest Logo
5:05 am - 10:45 amSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
6h 40m1 stop Las Vegas Harry Reid Intl
$274Southwest
Tue, Nov 10 - Wed, Nov 11
Delta Logo
6:00 am - 11:23 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
16h 23m2 stops Seattle/Tacoma Intl Minneapolis St Paul
Delta Logo
5:30 pm - 11:56 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
7h 26m1 stop Minneapolis St Paul
$336Delta
Wed, Nov 18 - Tue, Dec 1
United Airlines Logo
5:44 pm - 11:31 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
4h 47m1 stop Denver Intl
United Airlines Logo
6:00 am - 1:38 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
8h 38m2 stops Chicago O'Hare Intl Denver Intl
$354United Airlines
Thu, Sep 3 - Sun, Sep 6
United Airlines Logo
5:00 am - 3:43 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
9h 43m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
4:39 pm - 10:59 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
7h 20m1 stop Denver Intl
$394United Airlines
Thu, Oct 29 - Mon, Nov 2

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American Airlines flights from Boise to St. Louis

Our best American Airlines deals on Boise to St. Louis flight tickets
American Airlines
Sep 30
BOI3:21 pmBoise Air Term. Gowen Fld
8h 06m
1 stop
STL12:27 amLambert-St Louis
Oct 5
STL2:31 pmLambert-St Louis
9h 19m
1 stop
BOI10:50 pmBoise Air Term. Gowen Fld
$269
American Airlines
Sep 5
BOI2:58 pmBoise Air Term. Gowen Fld
8h 00m
1 stop
STL11:58 pmLambert-St Louis
Sep 8
STL5:42 amLambert-St Louis
6h 34m
1 stop
BOI11:16 amBoise Air Term. Gowen Fld
$271
American Airlines
Oct 7
BOI2:02 pmBoise Air Term. Gowen Fld
8h 40m
2 stops
STL11:42 pmLambert-St Louis
Oct 14
STL2:31 pmLambert-St Louis
9h 19m
1 stop
BOI10:50 pmBoise Air Term. Gowen Fld
$274

Southwest flights from Boise to St. Louis

Our best Southwest deals on Boise to St. Louis flight tickets
Southwest
Oct 1
BOI12:45 pmBoise Air Term. Gowen Fld
9h 40m
2 stops
STL11:25 pmLambert-St Louis
Oct 5
STL5:05 amLambert-St Louis
7h 15m
1 stop
BOI11:20 amBoise Air Term. Gowen Fld
$293
Southwest
Oct 1
BOI12:45 pmBoise Air Term. Gowen Fld
9h 40m
2 stops
STL11:25 pmLambert-St Louis
Oct 5
STL9:55 pmLambert-St Louis
14h 25m
2 stops
BOI11:20 amBoise Air Term. Gowen Fld
$304
Southwest
Oct 12
BOI6:50 pmBoise Air Term. Gowen Fld
14h 00m
2 stops
STL9:50 amLambert-St Louis
Oct 23
STL5:05 amLambert-St Louis
9h 15m
2 stops
BOI1:20 pmBoise Air Term. Gowen Fld
$347

momondo 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, momondo users made 832,500 searches. Data last updated August 13, 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

Price

Cheapest round-trip

BoiseSt. Louis

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

BOISTL

Boise Air Term. Gowen Fld

Thu 9/10

2:50 pm-11:17 am

1 stop19h 27m

Lambert-St Louis

Wed 9/16

12:17 pm-1:55 pm

1 stop26h 38m

$180

BoiseSt. Louis

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

BOISTL

Boise Air Term. Gowen Fld

Thu 9/10

2:50 pm-7:17 pm

2 stops27h 27m

Lambert-St Louis

Wed 9/16

12:17 pm-1:55 pm

1 stop26h 38m

$202

BoiseSt. Louis

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

BOISTL

Boise Air Term. Gowen Fld

Thu 9/10

2:50 pm-11:17 am

1 stop19h 27m

Lambert-St Louis

Sun 9/13

12:27 pm-1:55 pm

1 stop26h 28m

$254
Quickest round-trip

BoiseSt. Louis

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

BOISTL

Boise Air Term. Gowen Fld

Tue 11/10

2:51 pm-8:59 pm

1 stop5h 08m

Lambert-St Louis

Wed 11/11

5:00 am-11:30 am

1 stop7h 30m

$264

BoiseSt. Louis

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

BOISTL

Boise Air Term. Gowen Fld

Wed 11/18

5:15 am-2:39 pm

1 stop8h 24m

Lambert-St Louis

Tue 12/1

5:30 pm-11:56 pm

1 stop7h 26m

$269

BoiseSt. Louis

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

BOISTL

Boise Air Term. Gowen Fld

Mon 11/9

3:55 pm-10:20 pm

1 stop5h 25m

Lambert-St Louis

Tue 11/10

8:30 am-3:10 pm

2 stops7h 40m

$274

BoiseSt. Louis

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

BOISTL

Boise Air Term. Gowen Fld

Tue 11/10

6:20 am-3:20 pm

2 stops8h 00m

Lambert-St Louis

Wed 11/11

5:05 am-10:45 am

1 stop6h 40m

$274

BoiseSt. Louis

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

BOISTL

Boise Air Term. Gowen Fld

Wed 11/18

6:00 am-11:23 pm

2 stops16h 23m

Lambert-St Louis

Tue 12/1

5:30 pm-11:56 pm

1 stop7h 26m

$336

BoiseSt. Louis

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

BOISTL

Boise Air Term. Gowen Fld

Thu 9/3

5:44 pm-11:31 pm

1 stop4h 47m

Lambert-St Louis

Sun 9/6

6:00 am-1:38 pm

2 stops8h 38m

$354

BoiseSt. Louis

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

BOISTL

Boise Air Term. Gowen Fld

Thu 10/29

5:00 am-3:43 pm

2 stops9h 43m

Lambert-St Louis

Mon 11/2

4:39 pm-10:59 pm

1 stop7h 20m

$394

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 St. Louis from

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

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 Boise and St. Louis?

Prices are currently low for flights on this route.

Typical prices usually range from $387 to $556.
The lowest price recently found on this route was $180.

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

In general, February is the cheapest month to fly from Boise to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. The month of April is another great option to travel to St. Louis, with average flight prices from Boise averaging around $413.

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

When to book flights from Boise to St. Louis

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

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

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

Fastest flight time

4h 51m

Direct flights

None
The fastest flight from Boise to St. Louis takes 4h 51m
There are no direct flights from Boise to St. Louis. There are no popular flight routes from Boise to St. Louis.
Search flight deals

Frequently asked questions about flying from Boise to St. Louis

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

    The distance between Boise Air Term. Gowen Fld and Lambert-St Louis is about 1389.5 mi. By plane, this route typically takes 4h 51m.

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

    Prices for flights from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from Boise to St. Louis

Compare and see reviews for airlines that fly from Boise to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $260Free CancellationRating
7.8
8,505 reviews
Search Delta flights
United AirlinesPriceFrom $283Free CancellationRating
7.4
10,115 reviews
Search United Airlines flights
SouthwestPriceFrom $347Free CancellationRating
8.0
4,218 reviews
Search Southwest flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
St. Peters
Maryland Heights
Collinsville
Florissant
Alton
O'Fallon
Farmington
Clayton
Fenton
Festus
Wentzville
Eureka
Edwardsville
Litchfield
Grafton
Shrewsbury

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to St. Louis from Boise.

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

momondo does allow users to show only those flights to St. Louis from Boise which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Boise.

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

If you are not ready to book a flight from Boise to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

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