Cheapest return flights from Denver to Lisbon in December from $550

Best time to book flights for Denver (DEN) to Lisbon (LIS) flights at AirHint

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

Return flights

31 Dec - 08 Jan Air Canada
31 Dec - 07 Jan Air Canada
29 Dec - 06 Jan Lufthansa
29 Dec - 05 Jan Lufthansa
30 Dec - 07 Jan Lufthansa
28 Dec - 05 Jan Lufthansa
30 Dec - 06 Jan Lufthansa
27 Dec - 04 Jan Air Canada
25 Dec - 02 Jan United
26 Dec - 03 Jan Air Canada

Also check the deals for one-way flights from Denver 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.

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