Cheapest return flights from Lisbon to Keflavik in September from 211€

AirHint found the following cheapest return flights from Lisbon (LIS) to Keflavik (KEF) in September 2026 (see full year).

Return flights

29 Sep - 08 Oct easyJet
30 Sep - 10 Oct easyJet
17 Sep - 27 Sep easyJet
05 Sep - 15 Sep easyJet
10 Sep - 20 Sep easyJet
02 Sep - 13 Sep easyJet
13 Sep - 22 Sep Iberia
03 Sep - 13 Sep Iberia
20 Sep - 04 Oct Ryanair
17 Sep - 27 Sep Icelandair direct
20 Sep - 27 Sep KLM
10 Sep - 20 Sep Icelandair direct
13 Sep - 22 Sep Icelandair direct
29 Sep - 08 Oct Icelandair direct
20 Sep - 04 Oct Icelandair direct

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

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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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