This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $149 fare is the cheapest current round-trip from Salt Lake City (SLC) to ONT on Southwest flight WN331, departing 2026-09-10 at 19:20 with return on 2026-09-17.

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