Cheapest return flights from Portland to Keflavik in March from 422€

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

02 Mar - 10 Mar Frontier Airlines
11 Mar - 18 Mar Frontier Airlines
24 Mar - 01 Apr Spirit Airlines
17 Mar - 25 Mar Frontier Airlines
26 Mar - 02 Apr Frontier Airlines
25 Mar - 02 Apr Spirit Airlines
30 Mar - 07 Apr Spirit Airlines
26 Mar - 03 Apr Frontier Airlines
26 Mar - 01 Apr Spirit Airlines
29 Mar - 06 Apr Spirit Airlines
30 Mar - 06 Apr Spirit Airlines
05 Mar - 11 Mar Alaska Airlines
31 Mar - 06 Apr Spirit Airlines
31 Mar - 08 Apr Spirit Airlines
24 Mar - 31 Mar Spirit Airlines
11 Mar - 17 Mar Frontier Airlines
09 Mar - 17 Mar Frontier Airlines
18 Mar - 26 Mar Spirit Airlines
23 Mar - 31 Mar Spirit Airlines
14 Mar - 20 Mar Spirit 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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