Cheapest one-way flights from Boston to Keflavik in August from $114

AirHint found the following cheapest one-way flights from Boston (BOS) to Keflavik (KEF) in August 2025 (see full year).

One-Way flights

18 Aug Fly Play direct
20 Aug Fly Play direct
22 Aug Fly Play direct
26 Aug Spirit Airlines
28 Aug Spirit Airlines
30 Aug jetBlue
19 Aug Spirit Airlines
21 Aug Spirit Airlines
29 Aug Spirit Airlines
29 Aug Fly Play direct

Also check the deals for return flights from Boston to Keflavik in August.

Skyscanner

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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