STL - BOI

$160 Find Cheap Flights from St. Louis to Boise - Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 25% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$286
Typical prices: $391-$533
Frontier
Mon 12/17Sun 12/23
STL - BOI • 1 stop
Cheapest one-way
$160
Typical prices: $244-$366
American Airlines
Mon 11/19
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 • 19% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Dallas/Fort Worth (DFW)
Cheapest • Avg $341 (round-trip)
Salt Lake City (SLC)
Shortest trip • 5h 32m (one-way)
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Boise!
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

Thu, Dec 17 - Wed, Dec 23
Frontier Logo
5:45 pm - 4:48 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
24h 03m1 stop Las Vegas Harry Reid Intl
Frontier Logo
5:33 pm - 4:42 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
22h 09m1 stop Las Vegas Harry Reid Intl
$286Frontier
Thu, Nov 26 - Wed, Dec 2
American Airlines Logo
7:58 am - 5:00 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
10h 02m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
2:08 pm - 11:52 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
8h 44m1 stop Phoenix Sky Harbor Intl
$319American Airlines
Thu, Nov 26 - Wed, Dec 2
American Airlines Logo
7:58 am - 5:00 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
10h 02m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
2:08 pm - 12:02 amBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
8h 54m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl
$324American Airlines
Mon, Nov 23 - Sat, Nov 28
Delta Logo
7:00 pm - 12:14 amSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
6h 14m1 stop Salt Lake City
Delta Logo
6:45 pm - 12:40 amBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
4h 55m1 stop Salt Lake City
$354Delta
Sat, Nov 21 - Sat, Nov 28
Delta Logo
5:00 pm - 9:59 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
5h 59m1 stop Salt Lake City
Delta Logo
6:45 pm - 12:40 amBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
4h 55m1 stop Salt Lake City
$354Delta
Thu, Dec 24 - Mon, Dec 28
Frontier Logo
5:37 pm - 4:48 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
24h 11m1 stop Las Vegas Harry Reid Intl
Frontier Logo
5:33 pm - 4:42 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
22h 09m1 stop Las Vegas Harry Reid Intl
$372Frontier
Thu, Dec 17 - Tue, Dec 22
Southwest Logo
9:45 pm - 10:05 amSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
13h 20m1 stop Phoenix Sky Harbor Intl
Southwest Logo
6:10 pm - 12:55 amBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
5h 45m1 stop Phoenix Sky Harbor Intl
$374Southwest
Wed, Nov 25 - Wed, Dec 2
United Airlines Logo
4:39 pm - 9:32 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
5h 53m1 stop Denver Intl
United Airlines Logo
2:48 pm - 8:57 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
5h 09m1 stop Denver Intl
$397United Airlines
Mon, Nov 23 - Mon, Nov 30
Southwest Logo
7:20 pm - 12:55 amSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
6h 35m1 stop Phoenix Sky Harbor Intl
Southwest Logo
6:50 pm - 1:45 amBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
5h 55m1 stop Las Vegas Harry Reid Intl
$409Southwest
Fri, Nov 13 - Tue, Nov 17
United Airlines Logo
7:30 am - 6:03 pmSTL  Lambert-St Louis-BOI Boise Air Term. Gowen Fld
11h 33m2 stops Chicago O'Hare Intl Denver Intl
United Airlines Logo
5:00 am - 4:59 pmBOI  Boise Air Term. Gowen Fld-STL Lambert-St Louis
10h 59m2 stops Denver Intl Chicago O'Hare Intl
$687United Airlines
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 with more confidence.

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

Round-trip flights from St. Louis to Boise typically range from $391 to $533. The lowest price found in the past 5 days was $286, on Frontier.

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

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from St. Louis to Boise. It’s 11% cheaper than the average day, while Monday is the most expensive, with prices 27% higher.

What’s 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

October

Cheapest flight

$160
Beat the crowds with an average 45% drop in travelers.
The most popular month to fly with an average 36% increase in travelers.
One-way 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 answers about this route, including flight times, airports, airlines and booking tips.

  • 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.

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

    A nonstop flight from St. Louis to Boise takes 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.

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

    Round-trip flights from St. Louis to Boise range from $391 to $533, with an average of $443 over the past 12 months. Anything below $391 counts as a good deal.

  • 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 $286 to $1,870. That means the highest observed fare was about 7x 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 $237, which is 26% below the typical average for this route.

  • 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 averaging $84 for economy cars. Top options include:

    • Budget
    • Alamo
    • Hertz
    • Enterprise Rent-A-Car
    • Avis

  • 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).

  • 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) - 58% of one-stop connections
    • Salt Lake City (SLC) - 18% of one-stop connections
    • Dallas/Fort Worth (DFW) - 6% of one-stop connections
    • Minneapolis St Paul (MSP) - 4% of one-stop connections

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

    Yes. Flexible dates can save you up to 31% on flights from St. Louis to Boise. 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.

  • 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 32m, 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 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.

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 are flexible, aim for a Wednesday departure and avoid flying on Monday. On this route, Wednesday flights average $396, about $170 less than Monday fares (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
    • Super 8 by Wyndham Boise
    • 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