How much is the cheapest flight to St. Louis?

Prices were available within the past 7 days and starts at $28 for one-way flights and $51 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Reviews from verified customers

Mar 18, 2020

Only snacks available were for purchase. No complimentary snack.

Mar 16, 2020

Staff was friendly. Plane was clean. But seat was not comfortable. Space is too small and head rest is not designed for shorter person. The headrest positioning forces head into forward position hurting back. Either allow the headrest to move completely out of the way or get rid off it. Thank goodness I was only stuck with it for a 2 hour flight.

Mar 16, 2020

Not happy with the fact I Had to pay additional $ for a seat !!!! I Hate American Airlines !!!

Mar 14, 2020

Great company to fly with.

Mar 14, 2020

We had to reschedule our flight due to a death in the family. AA customer service was awesome in helping us get home quickly!!

Mar 13, 2020

Because of so many planes on the ground at Charlotte our arrival at the gate was delayed. American should negotiate with the airfield supervisor to help the aircraft load flow more smoothly.

Mar 12, 2020

I like United Airlines, trip to Denver was great. Trip to St Louis, Plane was too small seat very, very very, very,uncomfortable

Mar 10, 2020

A little odd that immediately boarding with first class still resulted in overflowing overhead bins, but otherwise fine.

Mar 5, 2020

Great flight!

Mar 5, 2020

Like the new plane

Find Your Flights to St. Louis STL

Cheap flights to St. Louis(STL)

Get started finding a cheap flight to St. Louis on Expedia by either choosing a deal on this page or entering into the search bar your travel dates, origin airport, and whether you want roundtrip or one-way airfare. You can filter for flexibility, number of stops, airline, and departure/arrival times to find the best flight for you.

We recommend using the ‘Flexible Dates’ calendar at the top of the page to see the price of plane tickets on the surrounding dates. This allows you to pick the cheapest days to fly if your trip allows flexibility and score cheap flight deals to St. Louis.

Roundtrip prices range from $51 - $110, and one-ways to St. Louis start as low as $28.

Be aware that choosing a non-stop flight can sometimes be more expensive while saving you time. And routes with connections may be available at a cheaper rate.

Airlines that fly to St. Louis (STL)

You have several options for which airline you choose to travel with to St. Louis. There are 10 airlines flying into STL: Frontier Airlines, Spirit Airlines, Alaska Airlines. 

Cheap plane tickets may be available from different airlines at different times and with unique terms. It’s best to understand the details of each airline’s offer before judging its value.

For example, if you plan to check a bag or bring a carry-on, check whether the cheap airfare deal includes a baggage allowance. If not, verify whether the baggage fee is higher than the difference of other airline plane ticket deals offering free checked/carry-on baggage in exchange for a slightly higher airfare. 

Additionally, your preferred frequent flyer membership programs may influence your choice of cheap airline. Expedia allows you to enter your membership numbers during checkout to earn points from your airline and Expedia Rewards—all while getting a great deal and planning all your travel in one online platform.

Find the best deals

At Expedia, we source many flight deals from multiple providers, so you can easily find the best deals that are right for you. A great strategy for getting the best deals can be to make sure you book and travel at the optimal times. Airfare to St. Louis (STL) varies throughout the year based on seasonal demand. You’ll see the lowest rates for roundtrips to STL in June and in July for one-ways.

Cancellation & flexibility

To change or cancel eligible flights, go to ‘My Trips’ and navigate to your itinerary. If you booked within the last 24-hours, you might be able to cancel your flight for free. Learn more about flight changes or cancellations from our customer service portal. Some plane tickets are available with no change fees, which you can filter for during your search.

Frequently asked questions

Trending flights to St. Louis

Prices were available within the past 7 days and starts at $28 for one-way flights and $51 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.