STL - BOI

$135 Find Cheap Flights from St. Louis to Boise - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$269
Typical prices: $372-$527
American Airlines
Sun 10/14Sat 10/20
STL - BOI • 1 stop
Cheapest one-way
$135
Typical prices: $233-$363
Delta
Sat 12/1
STL - BOI • 1 stop
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Boise. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
January
Cheapest • 17% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Chicago O'Hare Intl (ORD)
Cheapest • Avg $386 (round-trip)
Salt Lake City (SLC)
Shortest trip • 5h 29m (one-way)
Insights
Insights
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Boise (STL-BOI)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Boise

Wed, Oct 14 - Tue, Oct 20
American Airlines Logo
7:29 am - 2:33 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
8h 04m1 stop Chicago O'Hare Intl
American Airlines Logo
2:41 pm - 9:59 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
6h 18m1 stop Dallas/Fort Worth
$269American Airlines
Tue, Oct 13 - Tue, Oct 20
Delta Logo
5:35 pm - 11:59 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
7h 24m1 stop Minneapolis St Paul
Delta Logo
6:49 pm - 12:44 amBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
4h 55m1 stop Salt Lake City
$269Delta
Wed, Oct 14 - Tue, Oct 20
United Airlines Logo
7:08 am - 1:03 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
6h 55m1 stop San Francisco
United Airlines Logo
5:30 pm - 11:44 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
5h 14m1 stop Denver Intl
$269United Airlines
Wed, Oct 14 - Wed, Oct 21
Delta Logo
7:00 pm - 11:59 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
5h 59m1 stop Salt Lake City
Delta Logo
11:32 am - 5:44 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
5h 12m1 stop Salt Lake City
$269Delta
Tue, Oct 20 - Wed, Oct 21
American Airlines Logo
5:40 am - 11:24 amSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
6h 44m1 stop Dallas/Fort Worth
American Airlines Logo
2:02 pm - 11:42 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
8h 40m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth
$274American Airlines
Tue, Jan 5 - Wed, Jan 6
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
8:00 am - 5:54 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
8h 54m1 stop San Francisco
$359United Airlines
Tue, Jan 5 - Wed, Jan 6
Alaska Airlines Logo
3:54 pm - 10:22 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
7h 28m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:37 am - 2:56 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
7h 19m1 stop Seattle/Tacoma Intl
$359Alaska Airlines
Thu, Oct 15 - Tue, Oct 20
Alaska Airlines Logo
4:42 pm - 11:59 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
8h 17m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
2:06 pm - 11:59 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
8h 53m1 stop Seattle/Tacoma Intl
$363Alaska Airlines
Thu, Dec 3 - Sun, Dec 6
Southwest Logo
6:30 am - 11:00 amSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
5h 30m1 stop Denver Intl
Southwest Logo
5:35 am - 1:45 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
7h 10m2 stops Las Vegas Harry Reid Intl Kansas City
$397Southwest
Thu, Dec 3 - Sun, Dec 6
Southwest Logo
6:20 am - 3:10 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
9h 50m2 stops Chicago Midway Denver Intl
Southwest Logo
5:35 am - 1:45 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
7h 10m2 stops Las Vegas Harry Reid Intl Kansas City
$402Southwest
Booking Insights

Price, demand and travel trends for St. Louis to Boise flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from St. Louis to Boise with more confidence.

How much is a round-trip flight from St. Louis to Boise?

Round-trip flights from St. Louis to Boise start at $269. Prices are below average for this route right now, with typical round-trip fares ranging from $372 to $527. The lowest price found in the past 5 days was $269 on American Airlines.

What's the cheapest day of the week to fly from St. Louis to Boise?

Wednesday is the cheapest day of the week to fly from St. Louis to Boise, it is 9% cheaper than the average day. Monday is the most expensive day with flight prices 30% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

•January is the cheapest month to fly from St. Louis to Boise at $359 round-trip.
•February ($566) and March ($538) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 57% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

Key details for St. Louis to Boise flights

Low season

February

Cheapest flight

$135
Best time to beat the crowds but there is an average 31% increase in price.
Most popular time to fly with an average 9% increase in price.
Flight from St. Louis to Boise

When to book flights from St. Louis to Boise

Are your dates flexible? Find out the best times to travel from St. Louis to Boise based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your St. Louis to Boise flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from St. Louis to Boise?

    Flights from St. Louis to Boise usually depart from Lambert-St Louis (STL) and arrive at Boise Air Term. Gowen Fld (BOI).

  • What cabin classes can I book on flights from St. Louis to Boise?

    Only Economy Class is available on flights from St. Louis to Boise.

  • Which airports do connecting flights from St. Louis to Boise pass through?

    One-stop flights from St. Louis to Boise most commonly connect through:

    • Denver Intl (DEN) - 53% of one-stop connections
    • Salt Lake City (SLC) - 20% of one-stop connections
    • Seattle/Tacoma Intl (SEA) - 10% of one-stop connections
    • Chicago O'Hare Intl (ORD) - 5% of one-stop connections

    Denver Intl (DEN) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from St. Louis to Boise?

    Yes. Being flexible with your travel dates can save you up to 31% on the St. Louis to Boise route. Wednesday is the cheapest departure day at $396 round-trip on average, while Monday is the most expensive at $566, a difference of $170. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Boise?

    Some of the most popular sights in Boise are Idaho Central Arena, Julia Davis Park and Discovery Center of Idaho. These are among the most viewed places in Boise on KAYAK.

  • How long is a flight from St. Louis to Boise?

    A nonstop flight from St. Louis to Boise takes 0h 00m, covering 1,378 miles.

  • Do I need a passport to fly from St. Louis to Boise?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • Have flight prices from St. Louis to Boise changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $269 to $1,148. That means the highest observed fare was about 4x higher than the lowest one.

  • How are flight prices from St. Louis to Boise looking right now?

    One-way fares from St. Louis to Boise are currently lower than usual. Average one-way flight prices are about $170, which is 46% below the typical average for this route.

  • How much time can I save by choosing a different layover airport from St. Louis to Boise?

    Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 5h 29m, compared with 5h 51m via Chicago Midway (MDW) and 6h 04m via Minneapolis St Paul (MSP).

  • What is the time difference between St. Louis and Boise?

    Boise is 1 hour behind St. Louis (Mountain Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Boise Air Term. Gowen Fld Airport (BOI)?

    Boise Air Term. Gowen Fld Airport (BOI) hosts 5 major car rental companies, with daily rates starting from around $31 for economy cars. Top options include:
    • Budget
    • Alamo
    • Hertz
    • Enterprise Rent-A-Car
    • Avis

  • How much should I expect to pay for a St. Louis to Boise flight?

    Round-trip flights from St. Louis to Boise range from $372 to $527, with an average of $433 over the past 12 months. Anything below $372 counts as a good deal.

Your guide to booking St. Louis to Boise flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Wednesday departure instead of Monday. On this route, Wednesday flights average $396 - about $170 less than Monday (30% savings) based on the last 12 months.
  • If you can choose when to travel, plan your St. Louis to Boise trip for January. Fares historically average $359 round-trip in that month - typically $207 less than the most expensive month, which is February (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Boise Air Term. Gowen Fld Airport.
    - Ramada by Wyndham Boise
    - Hotel 28 Boise Airport, an Ascend Collection Hotel
    - Comfort Suites Airport

More options for your flight from St. Louis to Boise

Complete your trip to Boise with a hotel stay or car rental

Car rentals in Boise
Hotels in Boise
Vacations in Boise