Cheapest return flights from Chicago to Lisbon in December from 507€

Best time to book flights for Chicago (ORD) to Lisbon (LIS) flights at AirHint

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

Return flights

02 Dec - 16 Dec Air Canada
05 Dec - 19 Dec United
23 Dec - 30 Dec United
14 Dec - 21 Dec United
05 Dec - 19 Dec TAP direct
24 Dec - 28 Dec KLM
26 Dec - 30 Dec Lufthansa
24 Dec - 31 Dec KLM
14 Dec - 21 Dec TAP direct
25 Dec - 01 Jan Air France
24 Dec - 31 Dec TAP direct
26 Dec - 01 Jan Air France
26 Dec - 02 Jan TAP direct

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

Skyscanner

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