Every Washington–Barcelona fare we track, measured against the route's typical price whenever there is enough cached history to build one. Subscribe in any RSS reader for free single-route price alerts — no account, no email needed.https://flight.dealsen-ushttps://flight.deals/flights/washington-to-barcelona/#2026-12-07-2026-12-10-TPhttps://flight.deals/flights/washington-to-barcelona/#2026-12-07-2026-12-10-TPWAS → BCN round-trip on TAP Air Portugal, 2026-12-07 to 2026-12-10 (3 nights). Cached fare $426 vs typical $715.Tue, 01 Sep 2026 12:09:07 GMT