Cheapest return flights from Denver to Lisbon in May from $712

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 May 2025 (see full year).

Return flights

09 May - 16 May Icelandair
05 May - 11 May Aer Lingus
07 May - 16 May Aer Lingus
18 May - 25 May Aer Lingus
06 May - 13 May Icelandair
12 May - 19 May Icelandair
24 May - 31 May Icelandair
23 May - 31 May Icelandair
16 May - 27 May Aer Lingus
11 May - 27 May Sun Country Airlines
27 May - 03 Jun Icelandair

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

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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