Every Chicago–Lisbon 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/chicago-to-lisbon/#2026-11-20-2026-11-29-SKhttps://flight.deals/flights/chicago-to-lisbon/#2026-11-20-2026-11-29-SKCHI → LIS round-trip on SAS, 2026-11-20 to 2026-11-29 (9 nights). Cached fare $520 vs typical $820.Tue, 01 Sep 2026 12:09:07 GMT