Cheapest return flights from Philadelphia to Keflavik in March from 461€

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

Return flights

30 Mar - 06 Apr Frontier Airlines
28 Mar - 06 Apr Frontier Airlines
06 Mar - 14 Mar Spirit Airlines

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

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