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St. Louis

Find cheap American Airlines flights to St. Louis

CMH — STL
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
1 adult, Economy
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Find American Airlines flight deals to St. Louis

Cheapest American Airlines flights from USA to St. Louis
Explore the most affordable American Airlines flight options available from USA to St. Louis. Find the lowest fares with prices last updated on July 27, 2026.

This American Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:00 am
ATL
-
STL
1 stop5h 14m
American Airlines
Mon 8/313:25 pm
STL
-
ATL
1 stop4h 23m
American Airlines
Deal found 7/26$159
This American Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/184:15 pm
DFW
-
STL
Nonstop1h 50m
American Airlines
Tue 8/2510:16 am
STL
-
DFW
Nonstop1h 52m
American Airlines
Deal found 7/25$197
This American Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:29 am
DEN
-
STL
1 stop8h 08m
American Airlines
Sat 8/225:42 am
STL
-
DEN
1 stop5h 10m
American Airlines
Deal found 7/22$207

Flights to St. Louis with American Airlines at a glance

Find detailed information about American Airlines flights from USA to St. Louis. Explore the options provided by American Airlines to plan your journey from USA to St. Louis. Data last updated July 27, 2026.

Popular in

July

Cheapest in

August

Average price

$376

Round-trip from

$159

One-way from

$80
Highest demand for flights to St. Louis with American Airlines; 5% potential price increase.
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Best time to find cheap flights to St. Louis with American Airlines; 1% potential price drop.
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Average price for flights to St. Louis with American Airlines (round-trip).
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American Airlines
  • American Airlines
  • 8/27-8/31
  • 2 total stops
  • 10h 14m total
  • USA to St. Louis
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American Airlines
  • American Airlines
  • 9/6
  • 1 total stop
  • 4h 54m total
  • USA to St. Louis
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Cheapflights Insights

Find cheap American Airlines flights to St. Louis

How long is the flight to St. Louis with American Airlines?

On average, American Airlines flights from the United States to St. Louis take 2 hours 3 minutes. Flights to St. Louis from other popular cities in the United States will vary in length. Below are a few examples of popular routes and their flight times.

American Airlines weekly flight availability to St. Louis

The most flights to St. Louis operated by American Airlines are scheduled on a Sunday (42 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (36 on average).

When is the best time to book a flight to St. Louis with American Airlines?

The best time to book a flight to St. Louis with American Airlines is 44 days before departure. On average, fares are higher if you book 1 day before departure.

When is the cheapest time to fly to St. Louis with American Airlines?

Users looking for the cheapest American Airlines fares to St. Louis should consider flying on Wednesday at noon, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday at noon, when prices are usually at their highest.

FAQs about flights to St. Louis with American Airlines

  • Which airport do American Airlines flights arrive at when travelling to St. Louis?

    American Airlines flights on this route tend to land at Lambert-St Louis Airport.

  • Is American Airlines the cheapest airline for a flight to St. Louis?

    Flight prices will depend on many factors like date, time and cabin class so it is worth comparing flights before booking. Based on Cheapflights data the cheapest average return price for flights to St. Louis tends to be with Allegiant Air.

  • Are there alternative airlines other than American Airlines that fly to St. Louis?

    Southwest, Delta and United Airlines all fly to St. Louis and offer an alternative to American Airlines.

  • How much is a flight to St. Louis with American Airlines?

    The average price for a return flight with American Airlines is $410; with a one-way flight around $274.

See more FAQs

Reviews of American Airlines

See what Cheapflights users have to say about their American Airlines experience.
American Airlines
7.1
Good
10,000 reviews
Overview

Boarding

7.5

Comfort

7.2

Crew

7.9

Entertainment

6.8

Food

6.4

Popular American Airlines flights

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