This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $328 fare is the cheapest current round-trip from Seattle (SEA) to TUS on Southwest flight WN868, departing 2026-06-26 at 19:10 with return on 2026-07-03.

Clicking "Book this flight" opens Kiwi.com with this exact flight pre-filtered — same airline, same dates, same passenger count.