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

Return flights

27 Sep - 03 Oct	Wizz Air Malta
27 Sep - 10 Oct	Wizz Air Malta
13 Sep - 17 Sep	Wizz Air Malta
27 Sep - 05 Oct	Wizz Air Malta
27 Sep - 01 Oct	Wizz Air Malta
03 Sep - 10 Sep	Ryanair
01 Sep - 10 Sep	Ryanair
14 Sep - 24 Sep	Ryanair
14 Sep - 17 Sep	Ryanair
07 Sep - 10 Sep	Wizz Air Malta
02 Sep - 10 Sep	Wizz Air Malta
26 Sep - 01 Oct	Wizz Air Malta
26 Sep - 06 Oct	Ryanair
05 Sep - 10 Sep	Ryanair
17 Sep - 24 Sep	Ryanair
20 Sep - 01 Oct	Wizz Air Malta
01 Sep - 08 Sep	Ryanair
30 Sep - 04 Oct	Wizz Air Malta
28 Sep - 04 Oct	Ryanair
28 Sep - 06 Oct	Ryanair

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

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 September from $199

Return flights