This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $642 fare is the cheapest current round-trip from Atlanta (ATL) to CPH on Frontier flight F91168, departing 2026-08-25 at 06:05 with return on 2026-09-03.

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