This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $797 fare is the cheapest current round-trip from Reykjavik (KEF) to BOS on FI flight FI633, departing 2026-06-18 at 19:55 with return on 2026-06-21.

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