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

Return flights

20 Aug - 27 Aug	Fly Play	direct
13 Aug - 17 Aug	Fly Play	direct
20 Aug - 21 Aug	Fly Play	direct
21 Aug - 26 Aug	Fly Play	direct
06 Aug - 10 Aug	Fly Play	direct
02 Aug - 12 Aug	Fly Play	direct
06 Aug - 09 Aug	Fly Play	direct
01 Aug - 12 Aug	Wizz Air Malta
01 Aug - 03 Aug	Wizz Air Malta
03 Aug - 24 Aug	Vueling Airlines
24 Aug - 07 Sep	Vueling Airlines

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

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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Cheapest return flights from Keflavik to Dublin in August from 148€

Return flights