Roundtrip Philadelphia to Austin TX Flights on Southwest Airlines

No special codes or coupons are required. Get these roundtrip flights while supplies last.

Book Southwest Airlines roundtrip airfares between Philadelphia (PHL) and Austin, TX (AUS) with one quick stop each way. These basic economy fares allow a personal item and a carry-on bag.

Travel availability:

• Departs PHL: March 23, 30; April 3-4, 6, 10-14, 17, 20, 24-25; May 1-6, 8-10, 12-13, 15, 17, 19, 26-27, 29-30; June 2-4, 9
• Departs AUS: March 21, 23-28, 30; April 2, 4, 16-17, 21, 24, 28; May 1, 27-28; June 2-3, 10