Cheapest return flights from Keflavik to Lisbon in August from 251€

Best time to book flights for Keflavik (KEF) to Lisbon (LIS) flights at AirHint

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

Return flights

25 Aug - 01 Sep Fly Play direct
29 Aug - 05 Sep Fly Play direct
18 Aug - 25 Aug Fly Play direct
01 Aug - 08 Aug Fly Play direct
08 Aug - 15 Aug Fly Play direct
15 Aug - 22 Aug Fly Play direct
26 Aug - 02 Sep Fly Play
27 Aug - 03 Sep Fly Play
23 Aug - 30 Aug Fly Play
22 Aug - 29 Aug Fly Play direct
30 Aug - 06 Sep Fly Play
24 Aug - 31 Aug Fly Play
13 Aug - 20 Aug Fly Play
06 Aug - 26 Aug LOT
08 Aug - 28 Aug LOT
31 Aug - 07 Sep LOT
28 Aug - 04 Sep Icelandair direct
24 Aug - 07 Sep Vueling Airlines
24 Aug - 14 Sep Vueling Airlines
17 Aug - 07 Sep Vueling Airlines

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

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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