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

Return flights

03 Dec - 10 Dec	Ryanair
28 Dec - 30 Dec	Air Serbia
25 Dec - 12 Jan	Air Serbia
23 Dec - 30 Dec	Air Serbia
04 Dec - 07 Dec	Ryanair
27 Dec - 30 Dec	Air Serbia
22 Dec - 30 Dec	easyJet
13 Dec - 03 Jan	Eurowings
22 Dec - 29 Dec	Air Serbia
28 Dec - 31 Dec	Pegasus Airlines
16 Dec - 06 Jan	Ryanair
20 Dec - 23 Dec	LOT
30 Dec - 03 Jan	LOT
23 Dec - 26 Dec	Ryanair
26 Dec - 01 Jan	Ryanair

Also check the deals for one-way flights from Duesseldorf 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 Duesseldorf to Sofia in December from 133€

Return flights