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

Return flights

14 Mar - 18 Mar	Ryanair
01 Mar - 10 Mar	Ryanair
01 Mar - 14 Mar	Ryanair
09 Mar - 16 Mar	Ryanair
02 Mar - 07 Mar	Ryanair
15 Mar - 19 Mar	Ryanair
04 Mar - 10 Mar	Ryanair
16 Mar - 19 Mar	Ryanair
02 Mar - 05 Mar	Ryanair
17 Mar - 24 Mar	Ryanair
28 Mar - 04 Apr	Ryanair
28 Mar - 07 Apr	Ryanair
26 Mar - 05 Apr	Ryanair
30 Mar - 07 Apr	Ryanair
31 Mar - 04 Apr	Ryanair
30 Mar - 04 Apr	Wizz Air
28 Mar - 03 Apr	Ryanair
28 Mar - 01 Apr	Ryanair
27 Mar - 05 Apr	Scandinavian Airlines
31 Mar - 06 Apr	Ryanair

Also check the deals for one-way flights from Porto 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 Porto to Keflavik in March from 200€

Return flights