AirHint found the following cheapest return flights from Reykjavik (REK) to Lisbon (LIS) in August 2025 (see full year).

Return flights

18 Aug - 25 Aug	Fly Play	direct
22 Aug - 29 Aug	Fly Play	direct
04 Aug - 07 Aug	Eurowings
04 Aug - 14 Aug	Eurowings
15 Aug - 25 Aug	Fly Play	direct
05 Aug - 13 Aug	Wizz Air Malta
14 Aug - 18 Aug	Wizz Air
06 Aug - 13 Aug	easyJet
11 Aug - 18 Aug	Eurowings
09 Aug - 18 Aug	Wizz Air
29 Aug - 05 Sep	Fly Play	direct

Also check the deals for one-way flights from Reykjavik to Lisbon in August.

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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Cheapest return flights from Reykjavik to Lisbon in August from $347

Return flights