This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $352 fare is the cheapest current round-trip from San Jose (SJC) to ONT on Frontier flight F94104, departing 2026-05-01 at 20:15 with return on 2026-05-03.

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