Cheapest return flights from Phoenix to Keflavik in September from $603

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 September 2025 (see full year).

Return flights

08 Sep - 15 Sep WestJet
06 Sep - 13 Sep Alaska Airlines
13 Sep - 22 Sep WestJet
21 Sep - 29 Sep WestJet
06 Sep - 15 Sep WestJet
14 Sep - 23 Sep WestJet
15 Sep - 23 Sep WestJet
10 Sep - 19 Sep United
17 Sep - 26 Sep Hawaiian Airlines
15 Sep - 24 Sep Hawaiian Airlines
23 Sep - 02 Oct Air Canada
22 Sep - 01 Oct Air France
30 Sep - 09 Oct Air France
24 Sep - 02 Oct WestJet
27 Sep - 05 Oct Delta
27 Sep - 06 Oct Delta
25 Sep - 04 Oct Air Canada

Also check the deals for one-way flights from Phoenix to Keflavik in September.

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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