Cheapest return flights from Denver to Lisbon in October from $577

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

Return flights

27 Oct - 22 Nov Lufthansa
28 Oct - 22 Nov Lufthansa
29 Oct - 22 Nov Lufthansa
22 Oct - 15 Nov Air Canada
27 Oct - 03 Nov Lufthansa
22 Oct - 29 Oct United
24 Oct - 15 Nov Air Canada
20 Oct - 15 Nov Air Canada
31 Oct - 09 Nov Delta
18 Oct - 08 Nov Air Canada

Also check the deals for one-way flights from Denver to Lisbon in October.

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