Cheapest return flights from Sofia to Keflavik in September from 279€

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

Return flights

16 Sep - 23 Sep Ryanair
13 Sep - 05 Oct Pegasus Airlines
25 Sep - 30 Sep Ryanair
18 Sep - 23 Sep Ryanair
20 Sep - 28 Sep Ryanair
16 Sep - 30 Sep Ryanair
09 Sep - 14 Sep Ryanair
16 Sep - 26 Sep Ryanair
21 Sep - 29 Sep Wizz Air

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

Skyscanner

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

Feel free to contact us with any feedback or request another flight research.