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

Return flights

02 Dec - 09 Dec	Air France
03 Dec - 11 Dec	Air France
03 Dec - 12 Dec	Air France
10 Dec - 24 Dec	Air France
02 Dec - 22 Dec	British Airways
03 Dec - 24 Dec	Air France
02 Dec - 23 Dec	Air France
09 Dec - 18 Dec	Air France
04 Dec - 25 Dec	Austrian Airlines
02 Dec - 15 Dec	Lufthansa
24 Dec - 19 Jan	LOT
24 Dec - 17 Jan	LOT
10 Dec - 05 Jan	Austrian Airlines
23 Dec - 20 Jan	FrenchBee
23 Dec - 13 Jan	FrenchBee
14 Dec - 03 Jan	Austrian Airlines
12 Dec - 03 Jan	Austrian Airlines
17 Dec - 05 Jan	Austrian Airlines
18 Dec - 05 Jan	Austrian Airlines
13 Dec - 03 Jan	Austrian Airlines

Also check the deals for one-way flights from Newark 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 Newark to Sofia in December from 312€

Return flights