Which layover airport has the shortest travel time from Boise to St. Louis?

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 5h 06m.

What airlines fly to St. Louis?

Delta, United Airlines and Southwest are the top three most popular airlines that fly to St. Louis from Boise according to our data. Delta is the first choice among our users, with 33% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

How many flights depart from Boise to St. Louis on average per week?

As of October 2026, 1 flights take off from Boise and land in St. Louis each week. The most common flight departure day for this route is Fri, with 100% of weekly flights taking off on this day.

Which layover airport offers the lowest fares from Boise to St. Louis?

Flights via Portland (PDX) offer the lowest average round-trip price of $474.

Which layover airport has the shortest connection time from Boise to St. Louis?

Denver (DEN) has the shortest average layover time for this route: 0h 57m.

Which airport is the most popular layover for flights between Boise and St. Louis?

Denver (DEN) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

What is the cheapest airline that flies from Boise Air Term. Gowen Fld to Lambert-St Louis?

Frontier, Southwest, and American Airlines are the most popular carriers operating from Boise Air Term. Gowen Fld to Lambert-St Louis

When did momondo last update prices for flights from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport?

Prices for flights from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport are updated daily.

How many operators does momondo search for flights from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport?

As of October 2026, there are 4 operators available to choose from for flights from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport.

How old do you have to be to fly from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$148 Cheap Flights from Boise to St. Louis in 2026/27

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2:41 pm - 11:33 pmBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

7h 52m1 stop Dallas/Fort Worth

5:05 am - 12:37 pmSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

8h 32m1 stop Chicago O'Hare Intl

$369American Airlines

Sat, Nov 7 - Mon, Nov 9

6:40 am - 1:55 pmBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

6h 15m1 stop Dallas/Fort Worth

6:02 am - 12:59 pmSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

7h 57m1 stop Chicago O'Hare Intl

$369American Airlines

Sat, Dec 5 - Tue, Dec 15

6:35 pm - 12:46 amBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

5h 11m1 stop Salt Lake City

7:30 am - 12:17 pmSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

5h 47m1 stop Salt Lake City

$369Delta

Wed, Dec 30 - Tue, Jan 5

2:51 pm - 9:00 pmBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

5h 09m1 stop Denver Intl

6:00 am - 11:31 amSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

6h 31m1 stop Chicago O'Hare Intl

$369United Airlines

Sat, Nov 7 - Mon, Nov 9

2:25 pm - 10:10 pmBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

6h 45m1 stop Las Vegas Harry Reid Intl

6:05 am - 10:45 amSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

5h 40m1 stop Denver Intl

$369Southwest

Tue, Oct 27 - Thu, Oct 29

6:43 am - 3:44 pmBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

8h 01m1 stop Seattle/Tacoma Intl

6:00 am - 12:25 pmSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

7h 25m1 stop Seattle/Tacoma Intl

$369Alaska Airlines

Sat, Oct 31 - Sat, Nov 7

4:18 pm - 11:59 pmBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

6h 41m1 stop Seattle/Tacoma Intl

7:02 am - 3:23 pmSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

9h 21m1 stop Seattle/Tacoma Intl

$369Alaska Airlines

Wed, Oct 28 - Thu, Oct 29

1:25 pm - 11:55 pmBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

9h 30m2 stops Oakland Las Vegas Harry Reid Intl

5:30 am - 12:10 pmSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

7h 40m1 stop Las Vegas Harry Reid Intl

$374Southwest

Tue, Oct 27 - Thu, Oct 29

12:08 pm - 9:09 pmBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

8h 01m2 stops Seattle/Tacoma Intl Salt Lake City

2:20 pm - 10:26 pmSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

9h 06m2 stops Salt Lake City Seattle/Tacoma Intl

$418Delta

Sat, Nov 7 - Mon, Nov 9

12:00 pm - 11:24 pmBOI Boise Air Term. Gowen Fld-STL Lambert-St Louis

10h 24m2 stops San Francisco Chicago O'Hare Intl

5:00 am - 1:45 pmSTL Lambert-St Louis-BOI Boise Air Term. Gowen Fld

9h 45m2 stops Chicago O'Hare Intl Denver Intl

$489United Airlines

Wed, Oct 28 - Thu, Oct 29

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American Airlines flights from Boise to St. Louis

Our best American Airlines deals on Boise to St. Louis flight tickets

American Airlines

Dec 5

BOI2:08 pmBoise Air Term. Gowen Fld

8h 54m

2 stops

STL12:02 amLambert-St Louis

Dec 15

STL10:25 amLambert-St Louis

10h 06m

2 stops

BOI7:31 pmBoise Air Term. Gowen Fld

$380

American Airlines

Nov 24

BOI2:03 pmBoise Air Term. Gowen Fld

8h 46m

1 stop

STL11:49 pmLambert-St Louis

Dec 1

STL5:00 amLambert-St Louis

7h 28m

1 stop

BOI11:28 amBoise Air Term. Gowen Fld

$393

American Airlines

Nov 14

BOI2:41 pmBoise Air Term. Gowen Fld

7h 52m

1 stop

STL11:33 pmLambert-St Louis

Nov 21

STL4:31 pmLambert-St Louis

8h 18m

1 stop

BOI11:49 pmBoise Air Term. Gowen Fld

$442

United Airlines flights from Boise to St. Louis

Our best United Airlines deals on Boise to St. Louis flight tickets

United Airlines

Oct 28

BOI12:00 pmBoise Air Term. Gowen Fld

10h 24m

2 stops

STL11:24 pmLambert-St Louis

Oct 29

STL5:00 amLambert-St Louis

9h 45m

2 stops

BOI1:45 pmBoise Air Term. Gowen Fld

$489

United Airlines

Nov 24

BOI5:00 amBoise Air Term. Gowen Fld

9h 43m

2 stops

STL3:43 pmLambert-St Louis

Dec 1

STL8:40 amLambert-St Louis

5h 59m

1 stop

BOI1:39 pmBoise Air Term. Gowen Fld

$498

United Airlines

Oct 28

BOI5:00 amBoise Air Term. Gowen Fld

9h 43m

2 stops

STL3:43 pmLambert-St Louis

Oct 29

STL6:00 amLambert-St Louis

11h 42m

2 stops

BOI4:42 pmBoise Air Term. Gowen Fld

$517

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseSt. Louis

BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis

BOISTL

Boise Air Term. Gowen Fld

Sat 11/7

2:41 pm-11:33 pm

1 stop7h 52m

Lambert-St Louis

Mon 11/9

5:05 am-12:37 pm

1 stop8h 32m

$369

BoiseSt. Louis

BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis

BOISTL

Boise Air Term. Gowen Fld

Sat 12/5

6:40 am-1:55 pm

1 stop6h 15m

Lambert-St Louis

Tue 12/15

6:02 am-12:59 pm

1 stop7h 57m

$369

Quickest round-trip

BoiseSt. Louis

BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis

BOISTL

Boise Air Term. Gowen Fld

Wed 12/30

6:35 pm-12:46 am

1 stop5h 11m

Lambert-St Louis

Tue 1/5

7:30 am-12:17 pm

1 stop5h 47m

$369

BoiseSt. Louis

BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis

BOISTL

Boise Air Term. Gowen Fld

Sat 11/7

2:51 pm-9:00 pm

1 stop5h 09m

Lambert-St Louis

Mon 11/9

6:00 am-11:31 am

1 stop6h 31m

$369

BoiseSt. Louis

BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis

BOISTL

Boise Air Term. Gowen Fld

Tue 10/27

2:25 pm-10:10 pm

1 stop6h 45m

Lambert-St Louis

Thu 10/29

6:05 am-10:45 am

1 stop5h 40m

$369

BoiseSt. Louis

BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis

BOISTL

Boise Air Term. Gowen Fld

Sat 10/31

6:43 am-3:44 pm

1 stop8h 01m

Lambert-St Louis

Sat 11/7

6:00 am-12:25 pm

1 stop7h 25m

$369

BoiseSt. Louis

BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis

BOISTL

Boise Air Term. Gowen Fld

Wed 10/28

4:18 pm-11:59 pm

1 stop6h 41m

Lambert-St Louis

Thu 10/29

7:02 am-3:23 pm

1 stop9h 21m

$369

BoiseSt. Louis

BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis

BOISTL

Boise Air Term. Gowen Fld

Tue 10/27

1:25 pm-11:55 pm

2 stops9h 30m

Lambert-St Louis

Thu 10/29

5:30 am-12:10 pm

1 stop7h 40m

$374

BoiseSt. Louis

BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis

BOISTL

Boise Air Term. Gowen Fld

Sat 11/7

12:08 pm-9:09 pm

2 stops8h 01m

Lambert-St Louis

Mon 11/9

2:20 pm-10:26 pm

2 stops9h 06m

$418

BoiseSt. Louis

BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis

BOISTL

Boise Air Term. Gowen Fld

Wed 10/28

12:00 pm-11:24 pm

2 stops10h 24m

Lambert-St Louis

Thu 10/29

5:00 am-1:45 pm

2 stops9h 45m

$489

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Boise to St. Louis

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

Prices

Airlines

Layovers

Other information

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

In general, February is the cheapest month to fly from Boise to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. The month of April is another great option to travel to St. Louis, with average flight prices from Boise averaging around $413.

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

When to book flights from Boise to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Boise to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Boise to St. Louis (BOI to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boise to St. Louis

Best Price Found	$148
Fastest flight time	5h 09m
Direct flights	None

The best one-way flight to St. Louis from Boise in the past 72 hours is $148. The best round-trip flight deal from Boise to St. Louis found on momondo in the last 72 hours is $369.

The fastest flight from Boise to St. Louis takes 5h 09m

There are no direct flights from Boise to St. Louis. There are no popular flight routes from Boise to St. Louis.

Search flight deals

Frequently asked questions about flying from Boise to St. Louis

How far is Boise Air Term. Gowen Fld to Lambert-St Louis by plane?
The distance between Boise Air Term. Gowen Fld and Lambert-St Louis is about 1389.5 mi. By plane, this route typically takes 5h 09m.
When did momondo last update prices for flights from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport?
Prices for flights from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport are updated daily.
How many operators does momondo search for flights from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport?
As of October 2026, there are 4 operators available to choose from for flights from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport.
How old do you have to be to fly from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boise Air Term. Gowen Fld Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Boise to St. Louis?
Based on momondo bookings for flights between Boise and St. Louis, the leading airline is Delta, making up 33% of the total bookings. Other popular airlines include United Airlines with 28%, Southwest with 26%, and American Airlines with 13%.

Best airlines flying from Boise to St. Louis

Compare and see reviews for airlines that fly from Boise to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $316	Free Cancellation	Rating 7.8 8,631 reviews	Search Delta flights
Southwest	PriceFrom $347	Free Cancellation	Rating 7.9 4,215 reviews	Search Southwest flights
United Airlines	PriceFrom $355	Free Cancellation	Rating 7.4 10,280 reviews	Search United Airlines flights
American Airlines	PriceFrom $372	Free Cancellation	Rating 7.0 12,124 reviews	Search American Airlines flights

Southwest Flights From Boise to St. Louis
Southwest flies from Boise to St. Louis around 1 time per week, with 4,215 momondo users rating the airline 7.9/10. The cheapest Southwest deal from Boise to St. Louis in the last 72 hours was $347 (round-trip), much lower than the average airfare cost of $539 for Southwest flights on this route.

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Alton

Collinsville

Florissant

Hermann

Farmington

Clayton

Festus

O'Fallon

Fenton

Edwardsville

Eureka

Wentzville

Litchfield

Grafton

Waterloo

Why use momondo?

Why should I use momondo to find a flight deal from Boise to St. Louis?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to St. Louis from Boise.

Can I find flights from Boise to St. Louis with flexible booking policies on momondo?

momondo does allow users to show only those flights to St. Louis from Boise which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Boise to St. Louis?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Boise.

I’m not ready to book a flight from Boise to St. Louis right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Boise to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

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Cheap flights from Boise to St. Louis from $148

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boise to St. Louis departing on 10/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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American Airlines flights from Boise to St. Louis

Our best American Airlines deals on Boise to St. Louis flight tickets

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How to get the cheapest flight ticket from Boise to St. Louis

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

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

What is the cheapest airline that flies from Boise Air Term. Gowen Fld to Lambert-St Louis?

What airlines fly to St. Louis?

Which airport is the most popular layover for flights between Boise and St. Louis?

Which layover airport offers the lowest fares from Boise to St. Louis?

Which layover airport has the shortest travel time from Boise to St. Louis?

Which layover airport has the shortest connection time from Boise to St. Louis?

How many flights depart from Boise to St. Louis on average per week?

When to book flights from Boise to St. Louis

Cheap Boise to St. Louis (BOI to STL) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Boise to St. Louis

Best airlines flying from Boise to St. Louis

Compare and see reviews for airlines that fly from Boise to St. Louis with momondo

Traveling to a place near St. Louis?

Why use momondo?

An easier way to manage your St. Louis 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.

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Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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List of cabin classes available on flights landing in St. Louis. Availability may vary depending on flight origin and airline.

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