This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $454 fare is the cheapest current round-trip from Sofia (SOF) to OSS on PC flight PC272, departing 2026-09-21 at 13:45 with return on 2026-09-30.

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