Cheapest return flights from Denver to Lisbon in October from $569

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

Return flights

04 Oct - 11 Oct Icelandair
28 Oct - 04 Nov United
02 Oct - 09 Oct Icelandair
03 Oct - 10 Oct Icelandair
14 Oct - 21 Oct Icelandair
21 Oct - 28 Oct United
22 Oct - 29 Oct Air France
15 Oct - 22 Oct Air Canada
06 Oct - 13 Oct Aer Lingus
23 Oct - 30 Oct United
16 Oct - 24 Oct Air Canada
26 Oct - 02 Nov Delta

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

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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