Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Boise from $117

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Boise departing on 10/15. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Boise

Cheap round-trip flights

Frontier Logo
7:55 pm - 11:37 amSTL-BOI
16h 42m1 stop
Frontier Logo
12:22 pm - 9:06 amBOI-STL
19h 44m1 stop
$235Frontier
Find Deal
Wed, Sep 17 - Sun, Sep 21
Frontier Logo
7:55 pm - 11:37 amSTL-BOI
16h 42m1 stop
Frontier Logo
12:22 pm - 9:06 amBOI-STL
19h 44m1 stop
$245Frontier
Find Deal
Thu, Sep 18 - Fri, Sep 26
Delta Logo
2:25 pm - 10:32 pmSTL-BOI
9h 07m2 stops
Delta Logo
9:00 am - 9:21 pmBOI-STL
11h 21m2 stops
$274Delta
Find Deal
Tue, Sep 9 - Sat, Sep 13
Delta Logo
7:35 am - 10:32 pmSTL-BOI
15h 57m2 stops
Delta Logo
12:45 pm - 9:18 pmBOI-STL
7h 33m1 stop
$276Delta
Find Deal
Tue, Sep 2 - Sat, Sep 6
Hawaiian Airlines Logo
3:35 pm - 12:08 amSTL-BOI
9h 33m1 stop
Hawaiian Airlines Logo
6:35 am - 2:39 pmBOI-STL
7h 04m1 stop
$278Hawaiian Airlines
Find Deal
Sat, Sep 13 - Sat, Sep 20
United Airlines Logo
5:15 am - 9:42 amSTL-BOI
5h 27m1 stop
United Airlines Logo
5:00 am - 2:33 pmBOI-STL
8h 33m2 stops
$284United Airlines
Find Deal
Sun, Aug 24 - Tue, Aug 26
Southwest Logo
2:05 pm - 9:40 pmSTL-BOI
8h 35m2 stops
Southwest Logo
11:30 am - 9:50 pmBOI-STL
9h 20m2 stops
$289Southwest
Find Deal
Sat, Aug 30 - Wed, Sep 3
Southwest Logo
5:25 am - 3:50 pmSTL-BOI
11h 25m1 stop
Southwest Logo
5:45 am - 2:30 pmBOI-STL
7h 45m2 stops
$290Southwest
Find Deal
Thu, Sep 18 - Fri, Sep 26
United Airlines Logo
4:30 pm - 9:16 pmSTL-BOI
5h 46m1 stop
United Airlines Logo
7:00 am - 12:43 pmBOI-STL
4h 43m1 stop
$363United Airlines
Find Deal
Mon, Jan 19 - Sat, Jan 24
American Airlines Logo
6:00 am - 12:29 pmSTL-BOI
7h 29m1 stop
American Airlines Logo
5:15 pm - 12:16 amBOI-STL
6h 01m1 stop
$393American Airlines
Find Deal
Fri, Aug 15 - Tue, Aug 19

Delta flights from St. Louis to Boise

Our best Delta deals on St. Louis to Boise flight tickets
Delta
Sep 9
STL2:25 pmLambert-St Louis
9h 07m
2 stops
BOI10:32 pmBoise Air Term. Gowen Fld
Sep 13
BOI9:00 amBoise Air Term. Gowen Fld
11h 21m
2 stops
STL9:21 pmLambert-St Louis
$274
Find similar
Delta
Sep 2
STL7:35 amLambert-St Louis
15h 57m
2 stops
BOI10:32 pmBoise Air Term. Gowen Fld
Sep 6
BOI12:45 pmBoise Air Term. Gowen Fld
7h 33m
1 stop
STL9:18 pmLambert-St Louis
$276
Find similar
Delta
Aug 22
STL3:40 pmLambert-St Louis
7h 49m
1 stop
BOI10:29 pmBoise Air Term. Gowen Fld
Aug 25
BOI3:06 pmBoise Air Term. Gowen Fld
7h 18m
1 stop
STL11:24 pmLambert-St Louis
$279
Find similar

United Airlines flights from St. Louis to Boise

Our best United Airlines deals on St. Louis to Boise flight tickets
United Airlines
Aug 24
STL5:15 amLambert-St Louis
5h 27m
1 stop
BOI9:42 amBoise Air Term. Gowen Fld
Aug 26
BOI5:00 amBoise Air Term. Gowen Fld
8h 33m
2 stops
STL2:33 pmLambert-St Louis
$284
Find similar
United Airlines
Jan 19
STL4:30 pmLambert-St Louis
5h 46m
1 stop
BOI9:16 pmBoise Air Term. Gowen Fld
Jan 24
BOI7:00 amBoise Air Term. Gowen Fld
4h 43m
1 stop
STL12:43 pmLambert-St Louis
$363
Find similar
United Airlines
Aug 24
STL5:15 amLambert-St Louis
5h 27m
1 stop
BOI9:42 amBoise Air Term. Gowen Fld
Aug 31
BOI5:00 amBoise Air Term. Gowen Fld
9h 44m
2 stops
STL3:44 pmLambert-St Louis
$364
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from St. Louis to Boise that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 9/17

7:55 pm-11:37 am

1 stop16h 42m

Boise Air Term. Gowen Fld

Sun 9/21

12:22 pm-9:06 am

1 stop19h 44m

$235

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 9/18

7:55 pm-11:37 am

1 stop16h 42m

Boise Air Term. Gowen Fld

Fri 9/26

12:22 pm-9:06 am

1 stop19h 44m

$245

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Tue 9/9

2:25 pm-10:32 pm

2 stops9h 07m

Boise Air Term. Gowen Fld

Sat 9/13

9:00 am-9:21 pm

2 stops11h 21m

$274

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Tue 9/2

7:35 am-10:32 pm

2 stops15h 57m

Boise Air Term. Gowen Fld

Sat 9/6

12:45 pm-9:18 pm

1 stop7h 33m

$276

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Sat 9/13

3:35 pm-12:08 am

1 stop9h 33m

Boise Air Term. Gowen Fld

Sat 9/20

6:35 am-2:39 pm

1 stop7h 04m

$278

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Sun 8/24

5:15 am-9:42 am

1 stop5h 27m

Boise Air Term. Gowen Fld

Tue 8/26

5:00 am-2:33 pm

2 stops8h 33m

$284

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Sat 8/30

2:05 pm-9:40 pm

2 stops8h 35m

Boise Air Term. Gowen Fld

Wed 9/3

11:30 am-9:50 pm

2 stops9h 20m

$289

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 9/18

5:25 am-3:50 pm

1 stop11h 25m

Boise Air Term. Gowen Fld

Fri 9/26

5:45 am-2:30 pm

2 stops7h 45m

$290

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Mon 1/19

4:30 pm-9:16 pm

1 stop5h 46m

Boise Air Term. Gowen Fld

Sat 1/24

7:00 am-12:43 pm

1 stop4h 43m

$363

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Fri 8/15

6:00 am-12:29 pm

1 stop7h 29m

Boise Air Term. Gowen Fld

Tue 8/19

5:15 pm-12:16 am

1 stop6h 01m

$393

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 cheapest month to fly to Boise?

The month of April is, on average, the cheapest month to fly to Boise from St. Louis, with most prices found around $316. If you aren’t able to travel during the month of April, then book flights to Boise from St. Louis during October instead. Flights to Boise in October, while not as cheap as those in April, still average around $367.

What is the cheapest day to depart on your flight to Boise?

Our data shows that Wednesday is the least expensive day to fly to Boise. Tickets to fly out on this day can be as low as $371. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $590. These prices are subject to change though, so be sure to set up a Price Alert for flights to Boise.

What is the cheapest time of day to depart on your flight to Boise?

Our data shows that the cheapest St. Louis to Boise flights are usually those with departure times at noon. Our users have found flights to Boise at noon for as low as $435. In the afternoon is when there is more demand to fly to Boise, so prices are often more expensive at around $489 per ticket.

How far in advance should I book a flight to Boise?

You are more likely to see cheaper flights to Boise from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Boise for around $418 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boise from St. Louis for as low as $262 on momondo.

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

As of July 2025, prices for St. Louis to Boise flights are approximately 79% more expensive 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

$117

Fastest flight time

5h 27m

Direct flights

None

Airports in Boise

1 airport
The best one-way flight to Boise from St. Louis in the past 72 hours is $117. The best round-trip flight deal from St. Louis to Boise found on momondo in the last 72 hours is $235.
The fastest flight from St. Louis to Boise takes 5h 27m
There are no direct flights from St. Louis to Boise. Popular non-direct route for this connection is Lambert-St Louis Airport - Boise Air Term. Gowen Fld Airport.
There is 1 airport near Boise: Boise Air Term. Gowen Fld (BOI)
Search flight deals

  • 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 27m.

  • 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 $239Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $286Free CancellationRating
8.0
7,981 reviews
Search Delta flights
United AirlinesPriceFrom $287Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
SouthwestPriceFrom $298Free CancellationRating
8.0
4,246 reviews
Search Southwest flights

Traveling to a place near Boise?

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

Why use momondo?

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?

Yes. momondo can track prices for St. Louis to Boise flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Boise trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 8/5
Tue 8/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States