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

Return flights

05 Dec - 08 Dec	Ryanair	direct
12 Dec - 15 Dec	Ryanair	direct
26 Dec - 28 Dec	Ryanair	direct
01 Dec - 03 Dec	Ryanair
04 Dec - 07 Dec	Ryanair
11 Dec - 14 Dec	Ryanair
28 Dec - 11 Jan	Ryanair	direct
14 Dec - 11 Jan	Ryanair
11 Dec - 15 Dec	Ryanair
20 Dec - 28 Dec	Ryanair
18 Dec - 28 Dec	Ryanair
18 Dec - 22 Dec	Ryanair
15 Dec - 02 Jan	Ryanair	direct
13 Dec - 10 Jan	Ryanair
12 Dec - 04 Jan	Ryanair	direct
29 Dec - 04 Jan	Ryanair	direct
29 Dec - 01 Jan	Ryanair
21 Dec - 05 Jan	Ryanair
30 Dec - 01 Jan	Air Serbia
19 Dec - 04 Jan	Air Serbia

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

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

Cheapest return flights from Frankfurt to Sofia in December from 55€

Return flights