What’s the top layover airport for flights from St. Louis to Boise?

Denver (DEN) – chosen by Cheapflights users on 80% of 1-stop itineraries from St. Louis to Boise on Cheapflights.

Which airport typically offers the quickest layover for flights from St. Louis to Boise?

Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 1h 06m.

What’s the fastest layover option from St. Louis to Boise?

Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 5h 10m.

What’s the cheapest layover airport for flights from St. Louis to Boise?

Seattle (SEA) is the most affordable 1-stop option, with an average round-trip price of $395.

How long is the flight from St. Louis to Boise?

For as low as $257, Frontier can have you in Boise from St. Louis in 13h 12m. The distance from St. Louis to Boise is about 1378 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

According to our current data, American Airlines ($186), Delta ($286), and Southwest ($292) offers the cheapest pricing from St. Louis to Boise. American Airlines is priced at 56% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from St. Louis to Boise one-way?

To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $82. Delta flights start at $139 while deals on United Airlines start at $156 one-way.

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.

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).

What are the most popular airlines that fly from St. Louis to Boise?

Before booking your flight from St. Louis to Boise check out the most popular airlines for this route: Delta, Southwest or United Airlines.

Most accurate provider : When it comes to deals on St. Louis-Boise flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Boise flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

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.

$168+ Flights from St. Louis to Boise

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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Lambert-St Louis to Boise Air Term. Gowen Fld are usually found in November or September, booked 75 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap 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 December 23, 2025.

Tue 12/306:45 pmSTL - BOI

1 stop6h 55mSouthwest

Fri 1/25:25 pmBOI - STL

1 stop6h 35mSouthwest

Deal found 12/21

$727

Sat 12/277:43 pmSTL - BOI

1 stop17h 00mFrontier

Sat 1/312:54 pmBOI - STL

2 stops19h 46mFrontier

Deal found 12/21

$877

Sat 12/275:02 pmSTL - BOI

1 stop6h 57mUnited Airlines

Sat 1/35:00 amBOI - STL

1 stop7h 20mUnited Airlines

Deal found 12/21

$880

Sat 12/2710:00 amSTL - BOI

2 stops9h 45mSouthwest

Sat 1/31:55 pmBOI - STL

2 stops7h 55mSouthwest

Deal found 12/21

$932

Best flights from St. Louis to Boise
Discover carefully curated flight deals from St. Louis to Boise that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 23, 2025.

Wed 2/188:17 pmSTL - BOI

2 stops16h 34mFrontier

Sun 2/2211:56 amBOI - STL

1 stop24h 13mFrontier

Deal found 12/20

$196

Wed 2/186:10 amSTL - BOI

2 stops13h 12mDelta

Sun 2/2210:41 amBOI - STL

2 stops11h 42mDelta

Deal found 12/20

$257

Thu 2/192:47 pmSTL - BOI

1 stop27h 48mAlaska Airlines

Sat 2/216:28 amBOI - STL

1 stop6h 23mAlaska Airlines

Deal found 12/21

$330

Thu 2/195:25 amSTL - BOI

1 stop6h 35mSouthwest

Sat 2/213:30 pmBOI - STL

1 stop7h 10mSouthwest

Deal found 12/21

$334

Thu 3/197:00 amSTL - BOI

1 stop6h 48mAmerican Airlines

Tue 3/246:38 amBOI - STL

1 stop6h 13mAmerican Airlines

Deal found 12/21

$363

Sun 1/410:10 pmSTL - BOI

1 stop17h 54mMultiple Airlines

Thu 1/82:58 pmBOI - STL

2 stops29h 23mMultiple Airlines

Deal found 12/19

$384

Thu 2/193:40 pmSTL - BOI

2 stops9h 05mDelta

Sat 2/217:30 amBOI - STL

2 stops13h 08mDelta

Deal found 12/21

$387

Sun 1/182:50 pmSTL - BOI

1 stop7h 15mAlaska Airlines

Thu 1/2211:35 amBOI - STL

1 stop25h 19mAlaska Airlines

Deal found 12/19

$401

Thu 3/197:30 pmSTL - BOI

1 stop7h 25mSouthwest

Tue 3/2411:10 amBOI - STL

2 stops9h 15mSouthwest

Deal found 12/21

$402

Last-minute flights from St. Louis to Boise
Discover last-minute flight deals from St. Louis to Boise. Data last updated December 23, 2025 and is based on user searches.

Mon 1/55:16 amSTL - BOI

1 stop8h 21mAmerican Airlines

Wed 1/77:20 amBOI - STL

1 stop7h 54mAmerican Airlines

Deal found 12/22

$547

Mon 1/51:05 pmSTL - BOI

2 stops10h 35mUnited Airlines

Wed 1/78:15 amBOI - STL

1 stop6h 48mUnited Airlines

Deal found 12/22

$552

Tue 1/65:00 pmSTL - BOI

1 stop7h 48mUnited Airlines

Sun 1/119:48 amBOI - STL

1 stop6h 07mUnited Airlines

Deal found 12/20

$453

Tue 1/62:20 pmSTL - BOI

2 stops8h 55mSouthwest

Sun 1/1112:30 pmBOI - STL

2 stops8h 35mSouthwest

Deal found 12/20

$513

Sun 1/182:50 pmSTL - BOI

1 stop9h 11mAlaska Airlines

Thu 1/226:23 amBOI - STL

1 stop6h 31mAlaska Airlines

Deal found 12/20

$409

Sun 1/185:00 pmSTL - BOI

1 stop7h 48mUnited Airlines

Thu 1/226:10 amBOI - STL

2 stops10h 33mUnited Airlines

Deal found 12/21

$416

Wed 1/286:10 amSTL - BOI

2 stops13h 18mDelta

Tue 2/310:39 amBOI - STL

2 stops9h 59mDelta

Deal found 12/22

$236

Wed 1/282:50 pmSTL - BOI

1 stop7h 15mAlaska Airlines

Tue 2/36:23 amBOI - STL

1 stop6h 31mAlaska Airlines

Deal found 12/22

$296

One-way flights from St. Louis to Boise
Search for one-way flight options from St. Louis to Boise. Find affordable one-way fares based on user searches. Data last updated December 23, 2025.

Thu 1/15:02 pmSTL - BOI

1 stop6h 57mUnited Airlines

Deal found 12/22

$168

Thu 1/14:27 pmSTL - BOI

3 stops29h 34mMultiple Airlines

Deal found 12/22

$413

Sat 12/274:53 pmSTL - BOI

1 stop7h 06mAmerican Airlines

Deal found 12/22

$517

Sat 12/277:55 amSTL - BOI

2 stops14h 00mSouthwest

Deal found 12/22

$522

Sun 12/2811:51 amSTL - BOI

3 stops51h 39mMultiple Airlines

Deal found 12/22

$845

Sat 12/277:43 pmSTL - BOI

3 stops22h 09mMultiple Airlines

Deal found 12/22

$1,043

Find flight deals from St. Louis to Boise

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$236 (Delta)
One-way from	$168 (United Airlines)
Popular in	February
Cheapest in	November
Average price	$507

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. 7% potential increase in price ($33 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 2/18

8:17 pm-11:51 am

2 stops16h 34m

Boise Air Term. Gowen Fld

Sun 2/22

11:56 am-1:09 pm

1 stop24h 13m

$196

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Wed 2/18

6:10 am-6:22 pm

2 stops13h 12m

Boise Air Term. Gowen Fld

Sun 2/22

10:41 am-11:23 pm

2 stops11h 42m

$257

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 2/19

2:47 pm-5:35 pm

1 stop27h 48m

Boise Air Term. Gowen Fld

Sat 2/21

6:28 am-1:51 pm

1 stop6h 23m

$330

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 2/19

5:25 am-11:00 am

1 stop6h 35m

Boise Air Term. Gowen Fld

Sat 2/21

3:30 pm-11:40 pm

1 stop7h 10m

$334

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 3/19

7:00 am-12:48 pm

1 stop6h 48m

Boise Air Term. Gowen Fld

Tue 3/24

6:38 am-1:51 pm

1 stop6h 13m

$363

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Sun 1/4

10:10 pm-3:04 pm

1 stop17h 54m

Boise Air Term. Gowen Fld

Thu 1/8

2:58 pm-9:21 pm

2 stops29h 23m

$384

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 2/19

3:40 pm-11:45 pm

2 stops9h 05m

Boise Air Term. Gowen Fld

Sat 2/21

7:30 am-9:38 pm

2 stops13h 08m

$387

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Sun 1/18

2:50 pm-9:05 pm

1 stop7h 15m

Boise Air Term. Gowen Fld

Thu 1/22

11:35 am-1:54 pm

1 stop25h 19m

$401

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 3/19

7:30 pm-1:55 am

1 stop7h 25m

Boise Air Term. Gowen Fld

Tue 3/24

11:10 am-9:25 pm

2 stops9h 15m

$402

St. LouisBoise

STL - BOI

STLBOI

Lambert-St Louis

Thu 1/1

5:02 pm-10:59 pm

1 stop6h 57m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

Showing 1-10 of 17 results

Compare providers for flights from St. Louis to Boise

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 December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*1 star

*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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Boise flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Boise

Prices

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

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 75 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, September is the cheapest month in which you can book a flight from St. Louis to Boise (average of $186). Flying from St. Louis to Boise in January is currently the most expensive (average of $340). 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?

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 22% versus a flight in the evening.

Reviews of airlines servicing Boise

Read reviews from past customers who have flown Southwest, Delta, and United Airlines from St. Louis to Boise. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Southwest

8.0

Very good

4,253 reviews

Southwest

8.0

Very good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Delta

7.9

Good

8,014 reviews

Southwest

8.0

Very good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

United Airlines

7.4

Good

9,105 reviews

Southwest

8.0

Very good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

American Airlines

7.2

Good

11,054 reviews

Southwest

8.0

Very good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

How long is the flight from St. Louis to Boise?
For as low as $257, Frontier can have you in Boise from St. Louis in 13h 12m. The distance from St. Louis to Boise is about 1378 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines flying from St. Louis to Boise round-trip?
According to our current data, American Airlines ($186), Delta ($286), and Southwest ($292) offers the cheapest pricing from St. Louis to Boise. American Airlines is priced at 56% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from St. Louis to Boise one-way?
To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $82. Delta flights start at $139 while deals on United Airlines start at $156 one-way.
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, September is the cheapest month in which you can book a flight from St. Louis to Boise (average of $186). Flying from St. Louis to Boise in January is currently the most expensive (average of $340). 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

Ontario

Meridian

Nampa

Caldwell

McCall

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Alternative routes for St. Louis to Boise

Other flights to Boise

Top 4 airlines flying from St. Louis to Boise

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$186	Average$366	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$286	Average$390	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$292	Average$420	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$300	Average$476	FlexibilityNo cancel fee	On-time69%

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$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 1/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Boise with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Lambert-St Louis to Boise Air Term. Gowen Fld are usually found in November or September, booked 75 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap flight deals from St. Louis to Boise

Cheapest flights from St. Louis to BoiseExplore 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 December 23, 2025.

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 December 23, 2025.

Find flight deals from St. Louis to Boise

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Boise that are best for you.

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 December.

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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Boise

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

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

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

What’s the top layover airport for flights from St. Louis to Boise?

What’s the cheapest layover airport for flights from St. Louis to Boise?

What’s the fastest layover option from St. Louis to Boise?

Which airport typically offers the quickest layover for flights from St. Louis to Boise?

Reviews of airlines servicing Boise

Read reviews from past customers who have flown Southwest, Delta, and United Airlines from St. Louis to Boise. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.

How long is the flight from St. Louis to Boise?

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

What are the cheapest airlines to fly from St. Louis to Boise one-way?

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

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

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

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

Traveling to a place near Boise?

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Alternative routes for St. Louis to Boise

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Top 4 airlines flying from St. Louis to Boise

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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 December 23, 2025.