Cheapest return flights from Chicago to Lisbon in December from 345€

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

Return flights

03 Dec - 07 Dec Icelandair
10 Dec - 14 Dec Icelandair
08 Dec - 17 Dec Iberia
09 Dec - 17 Dec Iberia
01 Dec - 10 Dec Lufthansa
30 Dec - 13 Jan Iberia
31 Dec - 14 Jan Iberia
10 Dec - 17 Dec Iberia
05 Dec - 12 Dec Iberia
03 Dec - 07 Dec TAP direct
11 Dec - 18 Dec American Airlines
01 Dec - 07 Dec SWISS
29 Dec - 24 Jan Aer Lingus
26 Dec - 17 Jan Aer Lingus
31 Dec - 14 Jan TAP direct
31 Dec - 07 Jan Iberia
30 Dec - 07 Jan British Airways
15 Dec - 10 Jan KLM
28 Dec - 10 Jan Frontier Airlines
24 Dec - 09 Jan Spirit Airlines

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

Powered by

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Feel free to contact us with any feedback or request another flight research.