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

Return flights

28 Aug - 04 Sep	Lufthansa
19 Aug - 02 Sep	Fly Play	direct
28 Aug - 04 Sep	Fly Play	direct
21 Aug - 28 Aug	Wizz Air
21 Aug - 26 Aug	Fly Play	direct
21 Aug - 28 Aug	Fly Play	direct
18 Aug - 01 Sep	SWISS
18 Aug - 22 Aug	Austrian Airlines
18 Aug - 21 Aug	Austrian Airlines
19 Aug - 21 Aug	Fly Play	direct
18 Aug - 23 Aug	Austrian Airlines
19 Aug - 23 Aug	Wizz Air
18 Aug - 24 Aug	Austrian Airlines
19 Aug - 24 Aug	Lufthansa

Also check the deals for one-way flights from Keflavik to Split 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 Split in August from 252€

Return flights