This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $635 fare is the cheapest current round-trip from San Francisco (SFO) to BCN on DE flight DE2097, departing 2026-09-03 at 16:30 with return on 2026-09-08.

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