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

Return flights

07 Mar - 10 Mar	easyJet
07 Mar - 14 Mar	easyJet
14 Mar - 17 Mar	easyJet
02 Mar - 09 Mar	easyJet
02 Mar - 12 Mar	easyJet
08 Mar - 12 Mar	easyJet
01 Mar - 10 Mar	easyJet
07 Mar - 11 Mar	easyJet
02 Mar - 06 Mar	easyJet
08 Mar - 14 Mar	easyJet
27 Mar - 06 Apr	Transavia France
26 Mar - 04 Apr	easyJet
28 Mar - 04 Apr	easyJet
24 Mar - 01 Apr	easyJet
29 Mar - 09 Apr	Vueling Airlines
26 Mar - 05 Apr	easyJet
27 Mar - 01 Apr	easyJet
26 Mar - 03 Apr	Scandinavian Airlines
27 Mar - 02 Apr	Transavia France
28 Mar - 03 Apr	Transavia France

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

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 Lisbon to Keflavik in March from $168

Return flights