This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $427 fare is the cheapest current round-trip from Charlotte (CLT) to SJO on Frontier flight F92451, departing 2026-06-19 at 19:58 with return on 2026-06-29.

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