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

Return flights

25 Sep - 05 Oct	Wizz Air
22 Sep - 29 Sep	Fly Play
15 Sep - 22 Sep	Scandinavian Airlines
02 Sep - 15 Sep	Norwegian
29 Sep - 05 Oct	Fly Play
19 Sep - 10 Oct	Fly Play	direct
01 Sep - 11 Sep	Scandinavian Airlines
26 Sep - 05 Oct	Scandinavian Airlines
29 Sep - 05 Oct	Fly Play	direct
19 Sep - 26 Sep	Fly Play	direct
19 Sep - 22 Sep	Fly Play
04 Sep - 07 Sep	Scandinavian Airlines
18 Sep - 21 Sep	Wizz Air
22 Sep - 29 Sep	Fly Play	direct
11 Sep - 14 Sep	airBaltic
26 Sep - 05 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 196€

Return flights