Cheap flights from St. Louis to Boise from $111
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Boise departing on 7/16. 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 St. Louis to Boise
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Delta flights from St. Louis to Boise
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How to get the cheapest flight ticket from St. Louis to Boise
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 Boise?
The month of April is, on average, the cheapest month to fly to Boise from St. Louis, with most prices found around $316. If you aren’t able to travel during the month of April, then book flights to Boise from St. Louis during October instead. Flights to Boise in October, while not as cheap as those in April, still average around $357.
What is the cheapest day to depart on your flight to Boise?
Our data shows that Wednesday is the least expensive day to fly to Boise. Tickets to fly out on this day can be as low as $371. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $590. These prices are subject to change though, so be sure to set up a Price Alert for flights to Boise.
What is the cheapest time of day to depart on your flight to Boise?
Our data shows that the cheapest St. Louis to Boise flights are usually those with departure times at noon. Our users have found flights to Boise at noon for as low as $435. In the afternoon is when there is more demand to fly to Boise, so prices are often more expensive at around $489 per ticket.
How far in advance should I book a flight to Boise?
You are more likely to see cheaper flights to Boise from St. Louis when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to Boise for around $420 when searching 16 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boise from St. Louis for as low as $262 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to Boise Air Term. Gowen Fld?
Frontier, Hawaiian Airlines, and Delta are the most popular carriers operating from Lambert-St Louis to Boise Air Term. Gowen Fld
What airlines fly to Boise?
Delta, United Airlines and Southwest are the top three most popular airlines that fly to Boise from St. Louis according to our data. Delta is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Boise. Keep in mind that there are 4 different airlines that fly to Boise on a routine basis, so you have a few additional options to choose from.
When to book flights from St. Louis to Boise
Cheap St. Louis to Boise (STL to BOI) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Boise
How far is Lambert-St Louis to Boise Air Term. Gowen Fld by plane?
Lambert-St Louis and Boise Air Term. Gowen Fld are 1389.5 mi apart from one another. By plane, this route typically takes 4h 56m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Boise Air Term. Gowen Fld Airport?
Prices for flights from Lambert-St Louis Airport to Boise Air Term. Gowen Fld Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Boise Air Term. Gowen Fld Airport?
As of June 2025, there are 4 operators available to choose from for flights from Lambert-St Louis Airport to Boise Air Term. Gowen Fld Airport.
How old do you have to be to fly from Lambert-St Louis Airport to Boise Air Term. Gowen Fld Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Boise Air Term. Gowen Fld Airport.
What documentation or ID do you need to fly to Boise Air Term. Gowen Fld Airport?
The travel and health documents required for your trip to Boise Air Term. Gowen Fld Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Boise Air Term. Gowen Fld Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from St. Louis to Boise?
Based on momondo bookings for this flight route, the most popular airline on flight routes from St. Louis to Boise is Delta (53% of total bookings). The next most popular airlines are United Airlines (22%), Southwest (17%), and American Airlines (7%).
Best airlines flying from St. Louis to Boise
Compare and see reviews for airlines that fly from St. Louis to Boise with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $239 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $286 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom $287 | Free Cancellation | Rating 7.4 8,801 reviews | |||
| PriceFrom $298 | Free Cancellation | Rating 8.0 4,278 reviews |
Southwest Flights From St. Louis to Boise
Southwest is one of the most popular airlines flying from St. Louis to Boise, operating 1 flight/week on average for this route. A good Southwest flight deal for St. Louis to Boise starts from $298 round-trip, up to an average price of $481. Our users have rated Southwest at 8.0/10.
Traveling to a place near Boise?
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Why should I use momondo to find a flight deal from St. Louis to Boise?
It is quick and easy to find St. Louis to Boise flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Boise that suits you.
Can I find flights from St. Louis to Boise with flexible booking policies on momondo?
Flights from St. Louis to Boise with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from St. Louis to Boise?
momondo provides multiple filters to help you find the best flight to Boise from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from St. Louis to Boise right now. Can momondo alert me if prices change?
Yes. momondo can track prices for St. Louis to Boise flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.