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

You can find cheap return American Airlines flights from $250 from STL to PHX by sorting your results from “Price (lowest to highest)” on Expedia. Or look for options from $150 for a one-way journey.**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.

Search for round-trip or one-way flights to Phoenix in July or August. You could find cheaper fares with American Airlines during these quieter months.

Search for cheap American Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Sky Harbor Intl. Airport (PHX) one to three months before your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and journey, the best day to book a domestic flight is usually Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**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.

Jet off on one of American Airlines’s 14 weekly direct flights from Lambert-St. Louis Intl. Airport (STL) to Sky Harbor Intl. Airport (PHX). To view available options, enter your origin, dates and destination and hit search. Then use the “Nonstop” and “Airline” filters.

From takeoff till landing, a direct American Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Sky Harbor Intl. Airport (PHX) takes approximately 3h 29m.

If you’re looking for flexibility, Wednesday offers the most choice for American Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Sky Harbor Intl. Airport (PHX). You can select from 2 different departures.

The first flight from STL to PHX with American Airlines departs at 6:44AM UTC-6. You’ll touch down at 9:24AM UTC-7. The last American Airlines flight of the day takes off at 2:27PM UTC-6 and arrives at 4:52PM UTC-7. With 20% fewer cancellations for morning and mid-morning flights, beginning your travel day early is often the best option.**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.

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

For the Lambert-St. Louis Intl. Airport (STL) to Sky Harbor Intl. Airport (PHX) route, American Airlines typically operates Airbus A320 and Boeing 737-800 planes. Remember that last-minute changes are possible for operational reasons, so your flight may be on a different aircraft.

Changes are typically free within 24 hours of booking, but your airline may add a charge after that. For more information about altering your reservation, check out your “Trips,” select your flight and click on “Manage Booking.” If you want the flexibility to adjust your plans without additional charges, check the “No cancel fee” or “Changes included” filter when planning your next escape.