Cheapest return flights from Philadelphia to Keflavik in May from 564€

AirHint found the following cheapest return flights from Philadelphia (PHL) to Keflavik (KEF) in May 2026 (see full year).

Return flights

29 May - 03 Jun Icelandair
24 May - 31 May Finnair
23 May - 30 May Air France

Also check the deals for one-way flights from Philadelphia to Keflavik in May.

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