219 € Cheap Flights from Boise to St Louis

Compare Boise to St Louis flight deals

Find the cheapest month or even day of the year to fly to St Louis

Book the best St Louis fare with no extra fees

Flight deals from Boise Airport to St Louis Airport

Looking for a cheap last-minute deal or the best return flight from Boise Airport to St Louis Airport? If you want to travel next month, return fares start from 219 €. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Boise to St Louis

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

Boise to St Louis: Alternative routes

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

Boise to St Louis: Flight information

The things to know before you go.
Cheapest flight found219 €
Cheapest month to flyApril

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

The best price we found for a return flight from Boise to St Louis is 219 €. 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 Boise to St Louis. But we found flights with one or more stops from 219 €.
As of March 2026, there are no flights flying from Boise to St Louis.
The cheapest month to fly from Boise to St Louis is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Boise Airport to St Louis Airport on Thursday, 2 April 2026.
No airlines currently offer direct flights between Boise Airport and St Louis 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 St Louis 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 St Louis is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to St Louis.

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

  • The timezone in St Louis is UTC-5, which is one hour ahead of Boise.

  • To ensure you get on your BOI to STL flight, allow plenty of time for things like baggage drop and finding your gate. Turning up two hours before international departures and one hour before domestic flights is the general rule.

  • You'll likely experience bigger queues during popular months such as July. Arriving up to four hours ahead of international flights and two hours for domestic departures is a good idea.

  • Think about adding a stopover when booking your ticket from Boise Air Terminal (Gowen Field) Airport to Lambert-St. Louis International Airport. Just deselect 'Direct flights only' to break up your trip, or maybe even explore a new city along the way. Check out these options between BOI and STL:

    • Denver International Airport

    • Salt Lake City International Airport

    • Minneapolis-St. Paul International Airport

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

  • 98 € is the lowest price for a one-way Boise Air Terminal (Gowen Field) Airport to Lambert-St. Louis International Airport flight. Return flights start at 219 €. These fares may change depending on demand and availability.

  • To get your hands on cheap tickets from BOI to STL, book ahead. Airlines generally offer lower fares when flights are first released.

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

  • You don't need to check back in every day to see if fares have gone down when you create a Price Alert. We'll let you know the moment there's a change in price on cheap flights from BOI to STL.

  • Tailor your trip with filters. Select your ideal departure and arrival times, airlines and total journey duration. You can also sort your results by 'Cheapest,' 'Fastest' or 'Best' flights from Boise Air Terminal (Gowen Field) Airport to Lambert-St. Louis International Airport.

Handy information about Boise Air Terminal (Gowen Field) Airport (BOI)

  • BOI is located at 3201 Airport Way.

  • Boise Air Terminal (Gowen Field) Airport scores top marks for its on-time performance. 83.53% of flights that take off from BOI arrive at their destination without delay.

  • To reach Boise Air Terminal (Gowen Field) Airport from central Boise, it takes around 20 minutes if you're planning to drive. Of course, this depends on traffic. It's approximately 18 kilometres from the airport to the city centre.

  • Planning to take public transport? Expect a journey time of around 1 hour 35 minutes.

  • Get your travels off to a hassle-free start by staying near BOI. Whether you've booked an early flight from Boise Air Terminal (Gowen Field) Airport to Lambert-St. Louis International Airport or just don't want to be rushed, these hotels are the answer:

Arriving at Lambert-St. Louis International Airport (STL)

Getting from Lambert-St. Louis International Airport (STL) to central St Louis

  • The address for STL is 10701 Lambert International Blvd..

  • Lambert-St. Louis International Airport is roughly 26 kilometres from central St Louis. Driving there takes about 20 minutes.

  • It takes roughly 35 minutes if you're using public transport.

When to fly to Lambert-St. Louis International Airport (STL)

  • The quietest month for a flight from Boise Air Terminal (Gowen Field) Airport to Lambert-St. Louis International Airport is April, while July is the most popular. Pick the ideal time to visit St Louis based on whether you prefer a more relaxed vibe or a faster pace.

  • Lock in your flight from Boise Air Terminal (Gowen Field) Airport to Lambert-St. Louis International Airport for July if you want to explore St Louis during its warmest month. Expect temperatures of between 17ºC (63ºF) and 33ºC (91ºF).

  • For cooler conditions, search for a cheap ticket from BOI to STL in January. Temperatures average between -8ºC (18ºF) and 7ºC (45ºF) then.

Explore more of United States

  • Chicago is just one of the many places in United States waiting to be discovered after you've experienced St Louis. Around 418 kilometres away to the north-east, well-known attractions include Millennium Park, Art Institute of Chicago and LandShark Beer Garden at Navy Pier.

  • Indianapolis is another well-known destination in United States and is around 370 kilometres east of St Louis. No trip is complete without a visit to The Children's Museum of Indianapolis, Indianapolis Museum of Art and Indianapolis Zoo.

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