Cheapest return flights from Boston to Keflavik in May from $294

Best time to book flights for Boston (BOS) to Keflavik (KEF) flights at AirHint

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

Return flights

10 May - 14 May Fly Play direct
11 May - 14 May Fly Play direct
10 May - 23 May Fly Play direct
19 May - 24 May Fly Play direct
12 May - 21 May Fly Play direct
12 May - 19 May Fly Play direct
14 May - 21 May Fly Play direct
12 May - 16 May Fly Play direct
19 May - 20 May Fly Play direct
13 May - 22 May Fly Play direct
29 May - 03 Jun Icelandair direct
25 May - 02 Jun Icelandair direct
30 May - 04 Jun Icelandair direct
30 May - 06 Jun Icelandair direct
24 May - 01 Jun Air France
24 May - 01 Jun Icelandair direct

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

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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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