Cheapest return flights from Frankfurt to Sofia in September from 99€

Best time to book flights for Frankfurt (FRA) to Sofia (SOF) flights at AirHint

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

Return flights

13 Sep - 20 Sep Ryanair direct
20 Sep - 23 Sep Ryanair direct
13 Sep - 23 Sep Ryanair direct
13 Sep - 18 Sep Ryanair direct
16 Sep - 20 Sep Ryanair direct
02 Sep - 20 Sep Ryanair direct
02 Sep - 06 Sep Ryanair direct
02 Sep - 04 Sep Ryanair direct
16 Sep - 23 Sep Ryanair direct
16 Sep - 18 Sep Ryanair direct
29 Sep - 02 Oct Air Serbia
29 Sep - 02 Oct Lufthansa direct

Also check the deals for one-way flights from Frankfurt to Sofia 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 Sofia

Cheap car rent in Sofia