AirHint found the following cheapest return flights from Sofia (SOF) to Keflavik (KEF) in October 2025 (see full year).

Return flights

23 Oct - 27 Oct	Wizz Air
23 Oct - 26 Oct	Wizz Air
16 Oct - 19 Oct	Wizz Air
02 Oct - 06 Oct	Wizz Air
09 Oct - 12 Oct	Wizz Air
11 Oct - 17 Oct	Ryanair
08 Oct - 12 Oct	Wizz Air
28 Oct - 10 Nov	Ryanair
11 Oct - 20 Oct	LOT

Also check the deals for one-way flights from Sofia to Keflavik in October.

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from Sofia to Keflavik in October from 141€

Return flights