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

Return flights

27 Aug - 10 Sep	Ryanair
27 Aug - 04 Sep	Ryanair
27 Aug - 06 Sep	Ryanair
23 Aug - 03 Sep	Wizz Air Malta
29 Aug - 03 Sep	Ryanair
20 Aug - 26 Aug	Ryanair
20 Aug - 27 Aug	Ryanair
28 Aug - 05 Sep	Ryanair
19 Aug - 27 Aug	Ryanair
02 Aug - 12 Aug	Ryanair
28 Aug - 07 Sep	Ryanair
26 Aug - 04 Sep	Ryanair
30 Aug - 13 Sep	Ryanair
15 Aug - 20 Aug	Ryanair
05 Aug - 12 Aug	Ryanair
19 Aug - 28 Aug	Ryanair
05 Aug - 20 Aug	Ryanair
29 Aug - 06 Sep	Ryanair
18 Aug - 27 Aug	Ryanair
19 Aug - 23 Aug	Ryanair

Also check the deals for one-way flights from Vienna to Keflavik 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 Vienna to Keflavik in August from 259€

Return flights