St. Louis - Phoenix $132 Roundtrip, Nonstop on Southwest for Winter Travel

For winter travel, fly nonstop from St. Louis to Phoenix for $132 roundtrip on Southwest. If you're in Arizona and wish to meet a friend in Missouri, this fare also works from Phoenix to St. Louis.

Searching Southwest, I found seats departing St. Louis STL on Wednesday, January 9, returning from Phoenix PHX on Tuesday, January 15.

Other dates are available for travel on Tuesdays and Wednesdays in January and February.

See our fare details for booking info.

Book worry free since Southwest has no change fees and includes two free checked bags. Plus, this is currently lower than any other airlines flying this route. Allegiant has slightly lower $100 roundtrip fares from Belleville, IL (BLV) to Mesa (AZA) for fall travel, but fares are higher for winter travel and Allegiant charges many extra fees.

There are a lot of great fares departing middle America today, so make sure to check out our St. Louis (STL) page for a full list of deals. And for more deals to the desert this fall/winter, check out all of our fares to Phoenix (PHX) and Mesa (AZA).

For more tips on flying Southwest, check out our guide on How to Fly Southwest Airlines.

Need a room in Phoenix? Here's what's available for the listed dates on Hotelwatchdog.

September 5, 2018, American's basic economy fares limit your carry-on allowance to just one small personal item such as a purse or small backpack up to 18x14x8 inches. Other restrictions apply. Consider the higher regular economy fare if you require more carry-on allowanceSeptember 5, 2018, American's basic economy fares limit your carry-on allowance to just one small personal item such as a purse or small backpack up to 18x14x8 inches. Other restrictions apply. Consider the higher regular economy fare if you require more carry-on allowance