Cheap flights from Boise to St. Louis from $144
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 11/27. 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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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, April 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 $334. The month of August is another great option to travel to St. Louis, with average flight prices from Boise averaging around $336.
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $391. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $561. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from Boise in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $410 when looking at flights departing in the afternoon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $496 per ticket.
How far in advance should I book a flight to St. Louis?
You are more likely to see cheaper flights to St. Louis from Boise when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $436 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Boise for as low as $334 on momondo.
What is the cheapest airline that flies from Boise Air Term. Gowen Fld to Lambert-St Louis?
American Airlines, Delta, and Southwest 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 39% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 5 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
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
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 48m.
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 July 2025, there are 5 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 40% of the total bookings. Other popular airlines include Southwest with 25%, United Airlines with 25%, and American Airlines with 5%.
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 $226 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $226 | Free Cancellation | Rating 8.0 7,982 reviews | |||
| PriceFrom $292 | Free Cancellation | Rating 7.4 8,861 reviews | |||
| PriceFrom $306 | Free Cancellation | Rating 8.0 4,266 reviews | |||
| PriceFrom $326 | Free Cancellation | Rating 8.0 10,000 reviews |
Southwest Flights From Boise to St. Louis
Southwest flies from Boise to St. Louis around 2 times per week, with 4,266 momondo users rating the airline 8.0/10. The cheapest Southwest deal from Boise to St. Louis in the last 72 hours was $306 (round-trip), much lower than the average airfare cost of $448 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.