Every Boston–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/boston-to-barcelona/#2026-09-30-2026-10-04-IBhttps://flight.deals/flights/boston-to-barcelona/#2026-09-30-2026-10-04-IBBOS → BCN round-trip on Iberia, 2026-09-30 to 2026-10-04 (4 nights). Cached fare $355. Not enough cached history on this route yet to say what it usually costs.Sun, 30 Aug 2026 05:03:17 GMT