This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $141 fare is the cheapest current round-trip from Sofia (SOF) to FRA on RR flight RR1731, departing 2026-06-18 at 05:45 with return on 2026-06-24.

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