Cheapest return flights from Portland to Keflavik in March from 535€

Best time to book flights for Portland (PDX) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Portland (PDX) to Keflavik (KEF) in March 2025 (see full year).

Return flights

31 Mar - 09 Apr Frontier Airlines
31 Mar - 06 Apr Frontier Airlines
25 Mar - 02 Apr Spirit Airlines
31 Mar - 08 Apr Frontier Airlines
29 Mar - 06 Apr Frontier Airlines
30 Mar - 07 Apr Spirit Airlines
28 Mar - 05 Apr Spirit Airlines
26 Mar - 01 Apr Hawaiian Airlines
29 Mar - 04 Apr Frontier Airlines
30 Mar - 06 Apr Hawaiian Airlines
18 Mar - 26 Mar Frontier Airlines
11 Mar - 17 Mar Hawaiian Airlines
14 Mar - 20 Mar Alaska Airlines
21 Mar - 29 Mar Hawaiian Airlines

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

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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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