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.