This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $219 fare is the cheapest current round-trip from San Diego (SAN) to CHI on Frontier flight F91426, departing 2026-09-20 at 09:19 with return on 2026-09-23.

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