Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Boise from $103

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 12/17. 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

Enter your travel dates to find the best prices.
Delta Logo
11:23 am - 9:58 pm
STL
-
BOI
11h 35m2 stops
Delta Logo
7:25 am - 9:35 pm
BOI
-
STL
13h 10m2 stops
$288Delta
Tue, Jan 6 - Tue, Jan 13
Alaska Airlines Logo
7:00 am - 1:49 pm
STL
-
BOI
7h 49m1 stop
Alaska Airlines Logo
5:55 pm - 1:54 pm
BOI
-
STL
18h 59m1 stop
$296Alaska Airlines
Tue, Jan 6 - Tue, Jan 13
United Airlines Logo
8:45 am - 1:35 pm
STL
-
BOI
5h 50m1 stop
United Airlines Logo
10:15 am - 8:58 pm
BOI
-
STL
9h 43m2 stops
$302United Airlines
Tue, Jan 6 - Tue, Jan 13
Alaska Airlines Logo
7:00 am - 3:22 pm
STL
-
BOI
9h 22m1 stop
Alaska Airlines Logo
9:50 pm - 1:54 pm
BOI
-
STL
15h 04m1 stop
$311Alaska Airlines
Mon, Jan 5 - Tue, Jan 6
United Airlines Logo
2:45 pm - 9:32 pm
STL
-
BOI
7h 47m1 stop
United Airlines Logo
2:40 pm - 8:26 pm
BOI
-
STL
4h 46m1 stop
$328United Airlines
Fri, Feb 20 - Wed, Feb 25
Delta Logo
3:25 pm - 8:55 pm
STL
-
BOI
6h 30m1 stop
Delta Logo
1:47 pm - 12:18 am
BOI
-
STL
9h 31m2 stops
$333Delta
Wed, Mar 18 - Tue, Mar 24
Alaska Airlines Logo
2:50 pm - 11:01 pm
STL
-
BOI
9h 11m1 stop
Alaska Airlines Logo
1:55 pm - 1:54 pm
BOI
-
STL
22h 59m1 stop
$335Alaska Airlines
Thu, Jan 8 - Mon, Jan 12
Delta Logo
6:00 am - 12:28 pm
STL
-
BOI
7h 28m1 stop
Delta Logo
1:51 pm - 12:25 am
BOI
-
STL
9h 34m2 stops
$346Delta
Fri, Feb 20 - Wed, Feb 25
Delta Logo
3:25 pm - 8:55 pm
STL
-
BOI
6h 30m1 stop
Delta Logo
3:00 pm - 11:15 pm
BOI
-
STL
7h 15m1 stop
$353Delta
Wed, Mar 18 - Tue, Mar 24
Alaska Airlines Logo
7:00 am - 10:40 pm
STL
-
BOI
16h 40m1 stop
Alaska Airlines Logo
6:00 pm - 1:51 pm
BOI
-
STL
18h 51m1 stop
$354Alaska Airlines
Thu, Mar 5 - Mon, Mar 9

Delta flights from St. Louis to Boise

Our best Delta deals on St. Louis to Boise flight tickets
Delta
Jan 6
STL11:23 amLambert-St Louis
11h 35m
2 stops
BOI9:58 pmBoise Air Term. Gowen Fld
Jan 13
BOI7:25 amBoise Air Term. Gowen Fld
13h 10m
2 stops
STL9:35 pmLambert-St Louis
$288
Find similar
Delta
Mar 18
STL3:25 pmLambert-St Louis
6h 30m
1 stop
BOI8:55 pmBoise Air Term. Gowen Fld
Mar 24
BOI1:47 pmBoise Air Term. Gowen Fld
9h 31m
2 stops
STL12:18 amLambert-St Louis
$333
Find similar
Delta
Feb 20
STL6:00 amLambert-St Louis
7h 28m
1 stop
BOI12:28 pmBoise Air Term. Gowen Fld
Feb 25
BOI1:51 pmBoise Air Term. Gowen Fld
9h 34m
2 stops
STL12:25 amLambert-St Louis
$346
Find similar

Alaska Airlines flights from St. Louis to Boise

Our best Alaska Airlines deals on St. Louis to Boise flight tickets
Alaska Airlines
Jan 6
STL7:00 amLambert-St Louis
7h 49m
1 stop
BOI1:49 pmBoise Air Term. Gowen Fld
Jan 13
BOI5:55 pmBoise Air Term. Gowen Fld
18h 59m
1 stop
STL1:54 pmLambert-St Louis
$296
Find similar
Alaska Airlines
Jan 5
STL7:00 amLambert-St Louis
9h 22m
1 stop
BOI3:22 pmBoise Air Term. Gowen Fld
Jan 6
BOI9:50 pmBoise Air Term. Gowen Fld
15h 04m
1 stop
STL1:54 pmLambert-St Louis
$311
Find similar
Alaska Airlines
Jan 8
STL2:50 pmLambert-St Louis
9h 11m
1 stop
BOI11:01 pmBoise Air Term. Gowen Fld
Jan 12
BOI1:55 pmBoise Air Term. Gowen Fld
22h 59m
1 stop
STL1:54 pmLambert-St Louis
$335
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 December 10, 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

Tue 1/6

11:23 am-9:58 pm

2 stops11h 35m

Boise Air Term. Gowen Fld

Tue 1/13

7:25 am-9:35 pm

2 stops13h 10m

$288

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Tue 1/6

7:00 am-1:49 pm

1 stop7h 49m

Boise Air Term. Gowen Fld

Tue 1/13

5:55 pm-1:54 pm

1 stop18h 59m

$296

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Tue 1/6

8:45 am-1:35 pm

1 stop5h 50m

Boise Air Term. Gowen Fld

Tue 1/13

10:15 am-8:58 pm

2 stops9h 43m

$302

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Mon 1/5

7:00 am-3:22 pm

1 stop9h 22m

Boise Air Term. Gowen Fld

Tue 1/6

9:50 pm-1:54 pm

1 stop15h 04m

$311

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Fri 2/20

2:45 pm-9:32 pm

1 stop7h 47m

Boise Air Term. Gowen Fld

Wed 2/25

2:40 pm-8:26 pm

1 stop4h 46m

$328

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 3/18

3:25 pm-8:55 pm

1 stop6h 30m

Boise Air Term. Gowen Fld

Tue 3/24

1:47 pm-12:18 am

2 stops9h 31m

$333

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 1/8

2:50 pm-11:01 pm

1 stop9h 11m

Boise Air Term. Gowen Fld

Mon 1/12

1:55 pm-1:54 pm

1 stop22h 59m

$335

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Fri 2/20

6:00 am-12:28 pm

1 stop7h 28m

Boise Air Term. Gowen Fld

Wed 2/25

1:51 pm-12:25 am

2 stops9h 34m

$346

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 3/18

3:25 pm-8:55 pm

1 stop6h 30m

Boise Air Term. Gowen Fld

Tue 3/24

3:00 pm-11:15 pm

1 stop7h 15m

$353

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 3/5

7:00 am-10:40 pm

1 stop16h 40m

Boise Air Term. Gowen Fld

Mon 3/9

6:00 pm-1:51 pm

1 stop18h 51m

$354

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 November is, on average, the cheapest month to fly to Boise from St. Louis, with most prices found around $358. If you aren’t able to travel during the month of November, then book flights to Boise from St. Louis during September instead. Flights to Boise in September, while not as cheap as those in November, still average around $382.

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 $425 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 $264 on momondo.

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

As of December 2025, prices for St. Louis to Boise flights are approximately 29% 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

Fastest flight time

5h 50m

Direct flights

None
The fastest flight from St. Louis to Boise takes 5h 50m
There are no direct flights from St. Louis to Boise. There are no popular flight routes from St. Louis to Boise.
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 50m.

  • 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 $186Free CancellationRating
7.2
11,048 reviews
Search American Airlines flights
DeltaPriceFrom $286Free CancellationRating
7.9
8,007 reviews
Search Delta flights
SouthwestPriceFrom $292Free CancellationRating
7.9
4,253 reviews
Search Southwest flights
United AirlinesPriceFrom $300Free CancellationRating
7.4
9,092 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
McCall
Meridian
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
Fri 1/9
Fri 1/16
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States