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

Return flights

13 Sep - 20 Sep	Wizz Air Malta
16 Sep - 06 Oct	Wizz Air Malta
06 Sep - 10 Sep	Wizz Air Malta
09 Sep - 15 Sep	Wizz Air Malta
04 Sep - 10 Sep	Ryanair
17 Sep - 24 Sep	Ryanair
01 Sep - 10 Sep	Ryanair
05 Sep - 10 Sep	Ryanair
23 Sep - 01 Oct	Ryanair
14 Sep - 24 Sep	Ryanair
19 Sep - 24 Sep	Ryanair
13 Sep - 23 Sep	Ryanair
19 Sep - 01 Oct	Ryanair
05 Sep - 01 Oct	Ryanair
30 Sep - 06 Oct	Wizz Air Malta
18 Sep - 08 Oct	Wizz Air Malta
27 Sep - 08 Oct	Wizz Air Malta
20 Sep - 01 Oct	Ryanair
23 Sep - 02 Oct	Ryanair
23 Sep - 04 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 174€

Return flights