Cheapest return flights from Chicago to Lisbon in December from $768

AirHint found the following cheapest return flights from Chicago (ORD) to Lisbon (LIS) in December 2025 (see full year).

Return flights

26 Dec - 09 Jan Air Canada
23 Dec - 30 Dec British Airways
31 Dec - 06 Jan Air Canada
24 Dec - 11 Jan Frontier Airlines
17 Dec - 24 Dec SWISS
25 Dec - 31 Dec Scandinavian Airlines
20 Dec - 28 Dec United
21 Dec - 28 Dec United
20 Dec - 06 Jan Arajet
17 Dec - 24 Dec TAP direct
24 Dec - 11 Jan TAP direct
19 Dec - 31 Dec United
26 Dec - 03 Jan Frontier Airlines
18 Dec - 04 Jan Frontier Airlines
26 Dec - 04 Jan Air Canada
26 Dec - 04 Jan TAP direct
19 Dec - 31 Dec TAP direct

Also check the deals for one-way flights from Chicago to Lisbon in December.

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