Cheapest return flights from Philadelphia to Keflavik in May from $508

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

Return flights

06 May - 11 May American Airlines
06 May - 13 May jetBlue
05 May - 11 May jetBlue
03 May - 10 May jetBlue
18 May - 22 May jetBlue

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

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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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