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

Return flights

11 Sep - 25 Sep	Scandinavian Airlines
04 Sep - 11 Sep	Scandinavian Airlines
11 Sep - 02 Oct	Scandinavian Airlines
20 Sep - 11 Oct	Fly Play
03 Sep - 10 Sep	Wizz Air
07 Sep - 19 Sep	Fly Play	direct
22 Sep - 02 Oct	Scandinavian Airlines
25 Sep - 05 Oct	airBaltic
19 Sep - 26 Sep	Fly Play
15 Sep - 22 Sep	Fly Play
05 Sep - 21 Sep	LOT
12 Sep - 21 Sep	LOT
04 Sep - 21 Sep	Scandinavian Airlines
04 Sep - 22 Sep	Scandinavian Airlines
19 Sep - 10 Oct	Fly Play	direct
26 Sep - 05 Oct	LOT
12 Sep - 03 Oct	LOT
26 Sep - 17 Oct	Fly Play
26 Sep - 17 Oct	Fly Play	direct

Also check the deals for one-way flights from Keflavik to Vilnius 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 Keflavik to Vilnius in September from $228

Return flights