Cheapest one-way flights from Boston to Keflavik in August from $164

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

One-Way flights

12 Aug Spirit Airlines
27 Aug Fly Play direct
06 Aug Fly Play direct
24 Aug Fly Play direct
02 Aug Spirit Airlines
19 Aug Spirit Airlines
15 Aug Fly Play direct
19 Aug Icelandair direct
12 Aug Icelandair direct
02 Aug Icelandair 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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