This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $838 fare is the cheapest current round-trip from San Francisco (SFO) to MAD on LOT Polish flight LO38, departing 2026-05-16 at 22:15 with return on 2026-05-28.

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