Cheap flights from Boise to St. Louis from $134
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 11/5. 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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Fly from
Fly to
Route
Depart
Return
BoiseSt. Louis
BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis
BOISTL
Boise Air Term. Gowen Fld
Wed 12/2
5:45 am-12:30 pm
1 stop5h 45m
Lambert-St Louis
Wed 12/9
6:30 am-11:00 am
1 stop5h 30m
BoiseSt. Louis
BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis
BOISTL
Boise Air Term. Gowen Fld
Thu 10/29
2:41 pm-11:42 pm
1 stop8h 01m
Lambert-St Louis
Tue 11/3
2:28 pm-10:57 pm
1 stop9h 29m
BoiseSt. Louis
BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis
BOISTL
Boise Air Term. Gowen Fld
Thu 1/21
1:15 pm-9:41 pm
1 stop7h 26m
Lambert-St Louis
Thu 1/28
7:30 am-12:17 pm
1 stop5h 47m
BoiseSt. Louis
BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis
BOISTL
Boise Air Term. Gowen Fld
Wed 12/2
5:45 am-12:30 pm
1 stop5h 45m
Lambert-St Louis
Wed 12/9
8:30 am-3:10 pm
2 stops7h 40m
BoiseSt. Louis
BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis
BOISTL
Boise Air Term. Gowen Fld
Thu 10/29
2:41 pm-11:42 pm
1 stop8h 01m
Lambert-St Louis
Tue 11/3
10:21 am-7:24 pm
2 stops10h 03m
BoiseSt. Louis
BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis
BOISTL
Boise Air Term. Gowen Fld
Thu 12/3
9:51 pm-1:47 pm
1 stop14h 56m
Lambert-St Louis
Fri 12/11
2:47 pm-8:56 pm
1 stop7h 09m
BoiseSt. Louis
BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis
BOISTL
Boise Air Term. Gowen Fld
Thu 1/21
10:38 am-11:18 pm
2 stops11h 40m
Lambert-St Louis
Thu 1/28
2:15 pm-11:52 pm
2 stops10h 37m
BoiseSt. Louis
BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis
BOISTL
Boise Air Term. Gowen Fld
Wed 11/25
12:31 pm-9:40 pm
1 stop8h 09m
Lambert-St Louis
Thu 11/26
8:50 am-1:47 pm
1 stop5h 57m
BoiseSt. Louis
BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis
BOISTL
Boise Air Term. Gowen Fld
Wed 10/28
12:31 pm-9:40 pm
1 stop8h 09m
Lambert-St Louis
Thu 10/29
8:00 am-4:42 pm
1 stop9h 42m
BoiseSt. Louis
BOI Boise Air Term. Gowen Fld - STL Lambert-St Louis
BOISTL
Boise Air Term. Gowen Fld
Tue 2/9
3:01 pm-2:56 pm
1 stop22h 55m
Lambert-St Louis
Thu 2/11
3:04 pm-10:20 pm
1 stop8h 16m
See travel insights to St. Louis from
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
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?
What is the cheapest airline that flies from Boise Air Term. Gowen Fld to Lambert-St Louis?
Frontier, American Airlines, and United Airlines are the most popular carriers operating from Boise Air Term. Gowen Fld to Lambert-St Louis
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.
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.
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 travel time from Boise to St. Louis?
Flights connecting via Denver (DEN) have the shortest average one-way travel time: 5h 06m.
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.
When to book flights from Boise to St. Louis
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
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 4h 55m.
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 29%, Southwest with 25%, and American Airlines with 12%.
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 | ||
|---|---|---|---|---|---|
| PriceFrom $316 | Free Cancellation | Rating 7.8 8,653 reviews | |||
| PriceFrom $347 | Free Cancellation | Rating 7.9 4,221 reviews | |||
| PriceFrom $355 | Free Cancellation | Rating 7.4 10,347 reviews | |||
| PriceFrom $372 | Free Cancellation | Rating 7.0 12,147 reviews |
Southwest Flights From Boise to St. Louis
Southwest flies from Boise to St. Louis around 3 times per week, with 4,225 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.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsWhy 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.