Cheapest return flights from Jacksonville to Keflavik in September from 597€

AirHint found the following cheapest return flights from Jacksonville (JAX) to Keflavik (KEF) in September 2025 (see full year).

Return flights

21 Sep - 24 Sep Frontier Airlines

Also check the deals for one-way flights from Jacksonville to Keflavik in September.

Skyscanner

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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