Every Lisbon–San Juan 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/lisbon-to-san-juan/#2026-12-20-2027-01-03-AAhttps://flight.deals/flights/lisbon-to-san-juan/#2026-12-20-2027-01-03-AALIS → SJU round-trip on American, 2026-12-20 to 2027-01-03 (14 nights). Cached fare $1,236. Not enough cached history on this route yet to say what it usually costs.Sun, 11 Oct 2026 11:34:28 GMT