Cheapest return flights from Keflavik to Dublin in September from $143

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

Return flights

20 Sep - 21 Sep Fly Play direct
11 Sep - 25 Sep Fly Play direct
04 Sep - 10 Sep Fly Play direct
14 Sep - 21 Sep Fly Play direct
01 Sep - 12 Sep Fly Play direct
01 Sep - 04 Sep Fly Play direct
03 Sep - 08 Sep Fly Play direct
04 Sep - 07 Sep Fly Play direct
26 Sep - 02 Oct Fly Play direct
09 Sep - 12 Sep Fly Play
03 Sep - 09 Sep Fly Play

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

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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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