Cheapest return flights from Chicago to Lisbon in December from $471

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

Return flights

08 Dec - 15 Dec Air Canada
09 Dec - 16 Dec United
29 Dec - 06 Jan Lufthansa
04 Dec - 11 Dec United
17 Dec - 08 Jan Air Canada
29 Dec - 05 Jan United
19 Dec - 26 Dec TAP direct
24 Dec - 02 Jan British Airways
19 Dec - 27 Dec Air Canada
24 Dec - 02 Jan TAP direct

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

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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