Cheapest return flights from Philadelphia to Keflavik in April from $448

Best time to book flights for Philadelphia (PHL) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Philadelphia (PHL) to Keflavik (KEF) in April 2025 (see full year).

Return flights

09 Apr - 13 Apr Frontier Airlines
04 Apr - 08 Apr Frontier Airlines
22 Apr - 29 Apr Spirit Airlines
30 Apr - 13 May jetBlue
16 Apr - 21 Apr Spirit Airlines
24 Apr - 27 Apr Spirit Airlines
25 Apr - 02 May Frontier Airlines

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

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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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