Cheapest return flights from Porto to Keflavik in May from $212

Best time to book flights for Porto (OPO) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Porto (OPO) to Keflavik (KEF) in May 2025 (see full year).

Return flights

08 May - 11 May Fly Play direct
07 May - 14 May Ryanair
10 May - 14 May Ryanair
11 May - 15 May Ryanair
21 May - 25 May Ryanair
10 May - 13 May Ryanair
08 May - 15 May Fly Play direct
29 May - 03 Jun Fly Play direct
09 May - 12 May Ryanair
08 May - 12 May Ryanair
07 May - 11 May Ryanair
22 May - 03 Jun Fly Play direct
29 May - 01 Jun Ryanair

Also check the deals for one-way flights from Porto to Keflavik in May.

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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