Cheapest return flights from Boston to Keflavik in May from $313

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

12 May - 21 May Fly Play direct
13 May - 22 May Fly Play direct
14 May - 19 May Fly Play direct
27 May - 05 Jun Fly Play direct
28 May - 06 Jun Fly Play direct
07 May - 14 May Fly Play direct
14 May - 22 May Fly Play direct
11 May - 20 May Fly Play direct
29 May - 01 Jun Fly Play direct
18 May - 22 May Fly Play direct
18 May - 24 May Fly Play direct
20 May - 29 May Fly Play direct
08 May - 17 May Fly Play direct
29 May - 17 Jun Fly Play direct
29 May - 02 Jun Fly Play direct
23 May - 01 Jun Fly Play 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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