Cheapest return flights from Chicago to Lisbon in December from 432€

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

Return flights

09 Dec - 16 Dec Delta
03 Dec - 11 Dec Delta
08 Dec - 15 Dec Delta
08 Dec - 14 Dec Virgin Atlantic
07 Dec - 14 Dec Virgin Atlantic
06 Dec - 13 Dec Delta
05 Dec - 12 Dec Virgin Atlantic
10 Dec - 17 Dec Virgin Atlantic
10 Dec - 14 Dec Virgin Atlantic
11 Dec - 18 Dec KLM
28 Dec - 14 Jan Porter Airlines (Canada) Ltd
29 Dec - 24 Jan Porter Airlines (Canada) Ltd
28 Dec - 12 Jan Delta
29 Dec - 06 Jan Frontier Airlines
26 Dec - 09 Jan Porter Airlines (Canada) Ltd
26 Dec - 17 Jan Porter Airlines (Canada) Ltd
14 Dec - 03 Jan Frontier Airlines
13 Dec - 03 Jan Frontier Airlines
25 Dec - 03 Jan Frontier Airlines
18 Dec - 04 Jan Porter Airlines (Canada) Ltd

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

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