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

Return flights

04 Sep - 14 Sep	Fly Play	direct
19 Sep - 22 Sep	Fly Play	direct
11 Sep - 14 Sep	Fly Play	direct
26 Sep - 29 Sep	Fly Play	direct
04 Sep - 07 Sep	Fly Play	direct
25 Sep - 02 Oct	Scandinavian Airlines
25 Sep - 29 Sep	Scandinavian Airlines
03 Sep - 09 Sep	Norwegian
22 Sep - 29 Sep	Fly Play	direct
18 Sep - 23 Sep	Ryanair
07 Sep - 11 Sep	airBaltic
04 Sep - 01 Oct	Ryanair
29 Sep - 02 Oct	Scandinavian Airlines

Also check the deals for one-way flights from Vilnius 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 Vilnius to Keflavik in September from $186

Return flights