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

Return flights

16 Sep - 14 Oct	Wizz Air Malta
23 Sep - 01 Oct	Wizz Air Malta
27 Sep - 05 Oct	Wizz Air Malta
27 Sep - 06 Oct	Wizz Air Malta
16 Sep - 22 Sep	Wizz Air Malta
24 Sep - 08 Oct	Wizz Air Malta
24 Sep - 01 Oct	Wizz Air Malta
26 Sep - 01 Oct	Wizz Air Malta
27 Sep - 04 Oct	Wizz Air Malta
16 Sep - 23 Sep	Wizz Air Malta
18 Sep - 02 Oct	Ryanair
26 Sep - 04 Oct	Wizz Air Malta
25 Sep - 30 Sep	Ryanair
18 Sep - 24 Sep	Ryanair
17 Sep - 24 Sep	Ryanair
16 Sep - 30 Sep	Wizz Air Malta
23 Sep - 29 Sep	Wizz Air Malta
09 Sep - 17 Sep	Ryanair
20 Sep - 25 Sep	Wizz Air Malta
18 Sep - 21 Sep	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 191€

Return flights