$136 Cheap Flights from Boise (BOI) to St. Louis (STL)

Popular airlines from Boise Airport (BOI) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from Boise to St. Louis (BOI-STL)

Prices were available within the past 7 days and start at $136 for one-way flights and $118 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Southwest Airlines
Delta
Alaska Airlines
American Airlines

Find the cheapest month to fly from Boise (BOI) to St. Louis (STL)

September is typically the cheapest month to fly

From $186 - $534 per traveler.

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Frequently asked questions

How much does a flight from Boise Airport (BOI) to Lambert-St. Louis Intl. Airport (STL) cost?
Get a cheap one-way flight from $136 or cheap return flight from $118 from Boise Airport (BOI) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Boise Airport (BOI) to Lambert-St. Louis Intl. Airport (STL)?
Planning your trip for November is a good way to save, as it's the cheapest month for flights between BOI and STL. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Boise Airport (BOI) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest BOI to STL flight.
How many flights per day from Boise Airport (BOI) to Lambert-St. Louis Intl. Airport (STL)?
Nonstop flights from Boise Airport (BOI) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BOI to STL?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Boise Airport (BOI) to Lambert-St. Louis Intl. Airport (STL)?
To touch down at Lambert-St. Louis Intl. Airport (STL) on time, book a flight that leaves Boise Airport (BOI) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Boise Airport (BOI) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your flight from BOI to STL just before your getaway is typically more expensive. However, if there's some wiggle room with your departure dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book a BOI to STL flight and hotel package?
Compared with arranging hotels and flights separately, booking a BOI to STL flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one convenient place takes the hassle out of travel planning. Just pick your flights and select from our extensive range of hotels, then customize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Boise Airport (BOI) to Lambert-St. Louis Intl. Airport (STL)?
If you booked your BOI to STL flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

Travel information

Origin airport
Boise
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$118
Distance
1379 mi

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