$150 Cheap American Airlines flights Phoenix (PHX) to St. Louis (STL)

Landing cheap one-way American Airlines flights from PHX to STL from $150 on Expedia is a cinch — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly round-trip fares from $254 for your next exciting adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

American Airlines flights to St. Louis tend to be more affordable in the quieter months of January and February. Whether you’re searching for a return or one-way ticket, you could find a better deal then.

To find cheap American Airlines fares from Sky Harbor Intl. Airport (PHX) to Lambert-St. Louis Intl. Airport (STL), start searching one to three months before your intended departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact what you pay. Sunday tends to be the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Yes, you can travel from Sky Harbor Intl. Airport (PHX) to Lambert-St. Louis Intl. Airport (STL) on any of American Airlines’s 14 weekly direct flights. Use our “Nonstop” and “Airline” filters to find the American Airlines flight that’ll arrive at STL at a time that suits you.

It takes around 3h 7m to travel nonstop from Sky Harbor Intl. Airport (PHX) to Lambert-St. Louis Intl. Airport (STL) with American Airlines.

American Airlines operates the most flights from Sky Harbor Intl. Airport (PHX) to Lambert-St. Louis Intl. Airport (STL) on Friday. With up to 2 daily departures, you’ll get the most choice and flexibility on this day.

The first American Airlines flight from PHX to STL takes off at 9:30AM UTC-7, arriving at 1:42PM UTC-6. If you want to jet off later, the last American Airlines flight leaves PHX at 7:58PM UTC-7 and touches down at STL at 11:57PM UTC-6. Flying before noon is often a good idea as morning flights are least likely to face cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Lambert-St. Louis Intl. Airport (STL) is the main St. Louis gateway for American Airlines flights from Sky Harbor Intl. Airport (PHX).

You’ll likely be seated on an Airbus A320 or a Boeing 737-800 when flying American Airlines from Sky Harbor Intl. Airport (PHX) to Lambert-St. Louis Intl. Airport (STL). However, keep in mind that a different aircraft may be used depending on operational demands.

Depending on the type of ticket you purchased, a fee is typically charged if you cancel or change your flight more than 24 hours after it has been confirmed. To secure flexible plane tickets, select our “Changes included” or “No cancel fee” filter when looking for flights. For additional information on canceling or modifying your reservation, head to “Trips,” select your flight and tick “Manage Booking.”