HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Boise

$168+ Cheap flights from St. Louis to Boise (STL - BOI)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BOI
Feb 4 — Feb 111
Tue 2/4
Tue 2/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Boise with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from Lambert-St Louis to Boise Air Term. Gowen Fld are usually found in October or February, booked 79 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap flight deals from St. Louis to Boise

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Boise (BOI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$334
(Delta)

One-way from

$168
(Delta)

Popular in

March

Cheapest in

October

Average price

$391
Provider with most accurate pricing for Lambert-St Louis-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Boise Air Term. Gowen Fld flights.
Search Deals
From Lambert-St Louis to Boise Air Term. Gowen Fld
Search Deals
One-way flight from Lambert-St Louis to Boise Air Term. Gowen Fld
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($9 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2025
Search Deals

Find flight deals from St. Louis to Boise

Cheapest flights from St. Louis to Boise
Explore the most affordable flight options available from St. Louis to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 30, 2025.

This Delta deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2610:22 amSTL - BOI
2 stops12h 49mDelta
Wed 3/510:35 amBOI - STL
2 stops10h 42mDelta
Deal found 1/29$334
This United Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/264:39 pmSTL - BOI
1 stop5h 50mUnited Airlines
Wed 3/511:05 amBOI - STL
1 stop6h 51mUnited Airlines
Deal found 1/29$335
This Alaska Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/217:00 amSTL - BOI
1 stop7h 51mAlaska Airlines
Thu 2/2711:04 amBOI - STL
1 stop11h 55mAlaska Airlines
Deal found 1/30$351
This Southwest deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/15:20 amSTL - BOI
1 stop5h 45mSouthwest
Sat 5/310:35 amBOI - STL
2 stops9h 35mSouthwest
Deal found 1/30$357
This Mytrip deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/69:20 amSTL - BOI
3 stops28h 12mMultiple Airlines
Sat 3/81:31 pmBOI - STL
3 stops25h 14mMultiple Airlines
Deal found 1/29$415
This Mytrip deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/115:38 pmSTL - BOI
3 stops43h 54mSpirit Airlines
Sat 3/151:31 pmBOI - STL
2 stops26h 11mSpirit Airlines
Deal found 1/28$510
This American Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/43:41 pmSTL - BOI
1 stop7h 11mAmerican Airlines
Wed 2/57:00 amBOI - STL
1 stop7h 10mAmerican Airlines
Deal found 1/30$799

Find flights from St. Louis to Boise within your budget

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, Cheapflights users made 2,558,603 searches. Data last updated January 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 2/26

6:00 am-1:45 pm

2 stops8h 45m

Boise Air Term. Gowen Fld

Wed 3/5

5:30 am-2:50 pm

1 stop8h 20m

$334

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 2/26

4:39 pm-9:29 pm

1 stop5h 50m

Boise Air Term. Gowen Fld

Wed 3/5

11:05 am-6:56 pm

1 stop6h 51m

$335

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Fri 2/21

7:00 am-1:51 pm

1 stop7h 51m

Boise Air Term. Gowen Fld

Thu 2/27

11:04 am-11:59 pm

1 stop11h 55m

$351

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 5/1

5:20 am-10:05 am

1 stop5h 45m

Boise Air Term. Gowen Fld

Sat 5/3

10:35 am-9:10 pm

2 stops9h 35m

$357

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 3/6

9:20 am-12:32 pm

3 stops28h 12m

Boise Air Term. Gowen Fld

Sat 3/8

1:31 pm-3:45 pm

3 stops25h 14m

$415

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Tue 3/11

5:38 pm-12:32 pm

3 stops43h 54m

Boise Air Term. Gowen Fld

Sat 3/15

1:31 pm-4:42 pm

2 stops26h 11m

$510

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Mon 3/10

7:30 pm-12:13 am

1 stop5h 43m

$168

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Mon 3/10

6:30 am-12:32 pm

3 stops31h 02m

$218

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 5/1

4:35 pm-11:30 pm

2 stops7h 55m

$229

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Compare providers for flights from St. Louis to Boise

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Boise in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Boise flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Boise flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Boise flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Boise flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Boise flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Boise

Have a flexible travel schedule? Discover the best time to fly to Boise from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from St. Louis to Boise

Get recent, data-driven insights about flights from St. Louis to Boise including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from St. Louis to Boise?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Boise. Price data was last updated on January 24, 2025.

The price you pay for your flight from St. Louis to Boise may vary depending on when you book. For the best chance of a lower fare, look to book 76 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from St. Louis to Boise?

Currently, October is the cheapest month in which you can book a flight from St. Louis to Boise (average of $314). Flying from St. Louis to Boise in June is currently the most expensive (average of $436). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to BOI?

Find hourly flight availability from St. Louis to Boise. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 30, 2025.

When flying from St. Louis to Boise, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 12% versus a flight in the afternoon.

Rainfall in Boise by month

Plan your trip to Boise by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Boise ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Boise when rainfall is around 0.2 in.

Temperature in Boise by month

Plan your trip to Boise by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Boise, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Boise

Get insights into the airlines that provide service to Boise. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boise. Reviews last updated January 30, 2025.
See what other customers who have flown with Southwest, Alaska Airlines and Delta from St. Louis to Boise have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Overall

8.1

Entertainment

7.7

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,585 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Overall

8.1

Entertainment

7.7

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,688 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Overall

8.1

Entertainment

7.7

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,454 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Overall

8.1

Entertainment

7.7

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,913 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Overall

8.1

Entertainment

7.7

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Overall

8.1

Entertainment

7.7

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Boise. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from St. Louis to Boise round-trip?

    According to our current data, Delta ($334), United Airlines ($335), and Alaska Airlines ($351) offers the cheapest pricing from St. Louis to Boise. Delta is priced at 26% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from St. Louis to Boise that include hotel bookings?

    Yes. In addition to deals on St. Louis to Boise flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Boise?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Boise.

  • Can I find deals for business class flights from St. Louis to Boise?

    Yes. Cheapflights offers flight deals from St. Louis to Boise by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Boise?

    Currently, October is the cheapest month in which you can book a flight from St. Louis to Boise (average of $314). Flying from St. Louis to Boise in June is currently the most expensive (average of $436). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Nampa
McCall
Meridian
Caldwell
Ontario

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Boise

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Jackson flights
Kansas City to Idaho Falls flights
Kansas City to Spokane flights
Kansas City to Jackson flights
Springfield to Jackson flights
Kansas City to Boise flights
Springfield to Boise flights
St. Louis to Spokane flights
Kansas City to West Yellowstone flights
St. Louis to Idaho Falls flights
Springfield to Spokane flights
Kansas City to Hailey flights
St. Louis to West Yellowstone flights
Springfield to Idaho Falls flights
Joplin to Spokane flights
Columbia to Jackson flights
St. Louis to Lewiston flights
Kansas City to Pocatello flights
Springfield to West Yellowstone flights
Joplin to Jackson flights
Columbia to West Yellowstone flights
St. Louis to Pocatello flights
Columbia to Spokane flights

Top 4 airlines flying from St. Louis to Boise

Discover the top 4 airlines that operate flights from St. Louis to Boise. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$280Average$531FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$296Average$461FlexibilityNo cancel feeOn-time69%
DeltaCheapest$296Average$408FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$366Average$503FlexibilityNo cancel feeOn-time63%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.