Cheapest return flights from Denver to Lisbon in April from $642

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 April 2025 (see full year).

Return flights

26 Apr - 11 May Frontier Airlines
27 Apr - 03 May Frontier Airlines
29 Apr - 08 May Icelandair
20 Apr - 30 Apr United
16 Apr - 23 Apr United
23 Apr - 30 Apr Iberia
22 Apr - 29 Apr Lufthansa
18 Apr - 26 Apr Icelandair
17 Apr - 27 Apr Air France
10 Apr - 23 Apr Frontier Airlines
04 Apr - 20 Apr Icelandair

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

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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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