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

Return flights

01 Dec - 07 Dec	Air Serbia
25 Dec - 29 Dec	Air Serbia
18 Dec - 03 Jan	Air Serbia
19 Dec - 06 Jan	Eurowings
26 Dec - 03 Jan	LOT
19 Dec - 03 Jan	LOT
22 Dec - 02 Jan	Ryanair
22 Dec - 04 Jan	Ryanair
20 Dec - 02 Jan	Ryanair
22 Dec - 03 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.

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Cheapest return flights from Duesseldorf to Sofia in December from $185

Return flights