Cheapest return flights from Boston to Keflavik in May from 311€

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

06 May - 16 May Fly Play direct
04 May - 16 May Fly Play direct
09 May - 13 May Fly Play direct
09 May - 19 May Fly Play direct
11 May - 21 May Spirit Airlines
01 May - 01 Jun Fly Play direct
06 May - 18 May Fly Play direct
14 May - 22 May Fly Play direct
10 May - 16 May Fly Play direct
12 May - 22 May Fly Play direct
13 May - 22 May Fly Play direct
26 May - 05 Jun Fly Play direct
18 May - 04 Jun Fly Play direct
31 May - 06 Jun Fly Play direct
25 May - 04 Jun Fly Play direct
19 May - 04 Jun Fly Play direct
29 May - 08 Jun Fly Play direct
30 May - 08 Jun Fly Play direct
22 May - 01 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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