Cheap Flights from St Louis to Boise

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Flight deals from St Louis to Boise

Looking for a cheap last-minute deal or the best return flight from St Louis to Boise? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to Boise

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Boise flights are currently cheapest in July.

St Louis to Boise: Alternative routes

Compare routes from St Louis to Boise below. You may find an airport to fly into that's cheaper, faster, or easier than Boise.

St Louis to Boise: Flight information

The things to know before you go.
Cheapest flight foundR 3,825
Cheapest month to flyJuly

Finding cheap flights from St Louis to Boise: Frequently asked questions

The best price we found for a return flight from St Louis to Boise is R 6,217. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from St Louis to Boise. But we found flights with one or more stops from R 6,217.
As of June 2025, there are no flights flying from St Louis to Boise.
The cheapest month to fly from St Louis to Boise is usually June 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Boise Airport on Friday, 4 July 2025.
No airlines currently offer direct flights between St Louis Airport and Boise Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Boise but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Boise is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Delta offers the cheapest flight tickets to Boise.

Flying from Lambert-St. Louis International Airport (STL) to Boise Air Terminal (Gowen Field) Airport (BOI): what you need to know

  • Give yourself enough time to catch your STL to BOI flight. As a rule of thumb, arrive at least two hours before international departures and an hour ahead for domestic flights.

  • You can expect longer queues during popular months such as July. Arriving up to four hours ahead of an international flight and two hours for domestic departures is a wise move.

  • We make it easy to book a flight with a stopover. To see all your options for tickets from Lambert-St. Louis International Airport to Boise Air Terminal (Gowen Field) Airport, uncheck 'Direct flights only.' Then, pick a flight offering a stop long enough to explore the city of your choice. Worthwhile stopovers between STL and BOI include:

    • Denver International Airport

    • Salt Lake City International Airport

    • Minneapolis-St. Paul International Airport

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Boise Air Terminal (Gowen Field) Airport (BOI)

  • R 3,825 is the lowest price for a one-way Lambert-St. Louis International Airport to Boise Air Terminal (Gowen Field) Airport flight. Return flights start from R 6,217. These prices can change depending on availability and demand.

  • Don't leave everything to the last minute. You're more likely to get cheap tickets from STL to BOI if you book early. Airlines often have some terrific early bird deals.

  • If you're willing to be flexible with your travel dates, use the 'Whole month' tool. It'll show you the lowest price across the month when looking for your flight from Lambert-St. Louis International Airport to Boise Air Terminal (Gowen Field) Airport.

  • Getting your hands on cheap flights from STL to BOI is a breeze with Price Alerts. Simply set up one of these automatic alerts and we'll notify you when there's a better deal.

  • Pick your ideal departure and arrival times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to find the best deals on flights from Lambert-St. Louis International Airport to Boise Air Terminal (Gowen Field) Airport.

Handy information about Lambert-St. Louis International Airport (STL)

Arriving at Boise Air Terminal (Gowen Field) Airport (BOI)

  • If you're landing on a late Lambert-St. Louis International Airport to Boise Air Terminal (Gowen Field) Airport flight, nothing beats the convenience of being close to the terminal. Grab your bags from the carousel and then be showered and snoozing soon after at one of these options near BOI:

  • Pick up a Boise Air Terminal (Gowen Field) Airport rental car and discover Boise and beyond with your own set of wheels. Budget, Alamo and Avis are top providers you can book with here.

  • Booking your ride from Boise Air Terminal (Gowen Field) Airport about one week ahead can help you get the best possible rate.

Getting from Boise Air Terminal (Gowen Field) Airport (BOI) to central Boise

  • You'll find BOI at 3201 Airport Way.

  • Boise Air Terminal (Gowen Field) Airport is roughly 18 kilometres from central Boise. The drive time takes about 20 minutes.

  • It takes roughly 1 hour 35 minutes when travelling by public transport.

When to fly to Boise Air Terminal (Gowen Field) Airport (BOI)

  • July is the busiest month for flights from Lambert-St. Louis International Airport to Boise Air Terminal (Gowen Field) Airport. For a quieter experience, visit Boise in May.

  • The warmest month in Boise is July, with temperatures ranging between 15ºC (59ºF) and 35ºC (95ºF). Lock in your flights from Lambert-St. Louis International Airport to Boise Air Terminal (Gowen Field) Airport in this month if you enjoy this type of weather.

  • January sees average temperatures of between -11ºC (12ºF) and 5ºC (41ºF). Search for cheap tickets from STL to BOI sometime around then if you like cooler conditions.

Explore more of United States

  • You've seen Boise, now it's time to explore other parts of United States. Journey about 467 kilometres north to Spokane to tick off its leading sights. From Manito Park to Northwest Museum of Arts & Culture and Spokane Falls, you've got a jam-packed schedule ahead.

  • Salt Lake City is another well-known destination in United States and is around 483 kilometres south-east of Boise. No journey is complete without experiencing Temple Square, Utah State Capitol and Red Butte Garden.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.