Cheapest return flights from Denver to Lisbon in June from $752

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 June 2025 (see full year).

Return flights

15 Jun - 22 Jun WestJet
14 Jun - 21 Jun WestJet
17 Jun - 24 Jun Icelandair
12 Jun - 19 Jun Icelandair
17 Jun - 28 Jun WestJet
12 Jun - 16 Jun Icelandair
04 Jun - 11 Jun WestJet
03 Jun - 10 Jun WestJet
05 Jun - 12 Jun WestJet
01 Jun - 08 Jun WestJet
24 Jun - 01 Jul Frontier Airlines
25 Jun - 02 Jul Frontier Airlines

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

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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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