Cheapest return flights from Phoenix to Keflavik in August from $797

Best time to book flights for Phoenix (PHX) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Phoenix (PHX) to Keflavik (KEF) in August 2025 (see full year).

Return flights

03 Aug - 09 Aug Frontier Airlines
03 Aug - 07 Aug WestJet
02 Aug - 14 Aug Frontier Airlines
12 Aug - 15 Aug Air Canada

Also check the deals for one-way flights from Phoenix 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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