Roundtrip Seattle to Phoenix or Vice Versa Nonstop Airfares

No special codes or coupons are required. Get these roundtrip Seattle to Phoenix or Vice Versa nonstop airfares while they are available.

These airfares are available through March 31, 2026. Roundtrip flights from Seattle (SEA) to Phoenix (PHX) or vice versa are available on Southwest, Delta, American, and Alaska Airlines.

Flight availability includes:

• Departures from SEA: November 9-19, 22-23, 28; December 2-17, 31; January 1-31; February 1-11, 14-28; March 1-4, 9-10
• Departures from PHX: November 8, 10, 12-15, 18-25; December 3-18, 20, 24-25; January 1, 6-18, 20-31; February 1, 3-15, 17-21, 24-28; March 3-8, 10-11

These are basic economy fares that include a personal item and a carry-on bag. No seat selection is available. If traveling with children, American and Alaska Airlines will seat families together according to their policies. Delta handles this on a case-by-case basis, and Southwest offers open seating.