Cheapest return flights from Denver to Lisbon in May from 520€

AirHint found the following cheapest return flights from Denver (DEN) to Lisbon (LIS) in May 2026 (see full year).

Return flights

05 May - 13 May Delta
10 May - 25 May Turkish Airlines
15 May - 24 May Frontier Airlines
14 May - 30 May Turkish Airlines
18 May - 24 May Delta
31 May - 07 Jun Icelandair
28 May - 01 Jun Turkish Airlines
29 May - 15 Jun Icelandair

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

Powered by

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Feel free to contact us with any feedback or request another flight research.