Cheapest return flights from Lisbon to Keflavik in September from 184€

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

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

Return flights

09 Sep - 17 Sep easyJet
24 Sep - 01 Oct Ryanair
22 Sep - 28 Sep Vueling Airlines
12 Sep - 22 Sep Ryanair
30 Sep - 09 Oct easyJet
01 Sep - 08 Sep Iberia
29 Sep - 02 Oct Vueling Airlines
29 Sep - 03 Oct TAP
20 Sep - 27 Sep easyJet
19 Sep - 27 Sep Ryanair
18 Sep - 22 Sep Ryanair
06 Sep - 13 Sep Ryanair
08 Sep - 15 Sep Vueling Airlines
29 Sep - 19 Oct Ryanair
22 Sep - 25 Sep Vueling Airlines
22 Sep - 02 Oct Transavia France
29 Sep - 03 Oct Fly Play direct

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

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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