Cheapest return flights from Phoenix (PHX) to Keflavik (KEF), September

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
14 Sep 21 Sep WestJet
03 Sep 10 Sep WestJet
02 Sep 09 Sep Frontier Airlines
11 Sep 19 Sep WestJet
15 Sep 22 Sep Frontier Airlines
16 Sep 23 Sep Frontier Airlines
22 Sep 29 Sep Virgin Atlantic
25 Sep 02 Oct Frontier Airlines
28 Sep 05 Oct Frontier Airlines
27 Sep 04 Oct Frontier Airlines
16 Sep 27 Sep WestJet
04 Sep 11 Sep Frontier Airlines
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deals for one-way flights from Phoenix to Keflavik in September.

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Updated May 21, 2026.

About these fares

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