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

Return flights

05 Mar - 10 Mar	easyJet
07 Mar - 12 Mar	easyJet
07 Mar - 14 Mar	easyJet
11 Mar - 16 Mar	easyJet
17 Mar - 24 Mar	easyJet
17 Mar - 23 Mar	easyJet
15 Mar - 17 Mar	easyJet
16 Mar - 23 Mar	easyJet
06 Mar - 10 Mar	easyJet
14 Mar - 20 Mar	easyJet
26 Mar - 26 Apr	easyJet
28 Mar - 05 Apr	easyJet
28 Mar - 06 Apr	easyJet
30 Mar - 04 Apr	Scandinavian Airlines
27 Mar - 05 Apr	Transavia France
28 Mar - 01 Apr	easyJet
23 Mar - 04 Apr	Scandinavian Airlines
31 Mar - 12 Apr	Ryanair
29 Mar - 29 Apr	transavia
31 Mar - 04 Apr	easyJet

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 146€

Return flights