Cheapest return flights from Denver to Lisbon in October from 517€

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 United
28 Oct - 22 Nov United
29 Oct - 22 Nov Lufthansa
27 Oct - 03 Nov Delta
30 Oct - 22 Nov Frontier Airlines
22 Oct - 29 Oct United
22 Oct - 15 Nov Frontier Airlines
23 Oct - 15 Nov Frontier Airlines
26 Oct - 15 Nov Frontier Airlines
24 Oct - 15 Nov Frontier Airlines
31 Oct - 09 Nov Delta

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

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