AirHint found the following cheapest return flights from Atlanta (ATL) to Bucharest (OTP) in December 2025 (see full year).

Return flights

10 Dec - 17 Dec	Austrian Airlines
09 Dec - 16 Dec	Lufthansa
08 Dec - 15 Dec	Spirit Airlines
02 Dec - 09 Dec	Air France
03 Dec - 10 Dec	Air France
07 Dec - 14 Dec	Spirit Airlines
06 Dec - 13 Dec	Spirit Airlines
01 Dec - 08 Dec	British Airways
04 Dec - 11 Dec	Air France
05 Dec - 12 Dec	Delta
31 Dec - 07 Jan	British Airways
29 Dec - 05 Jan	Lufthansa
30 Dec - 06 Jan	Lufthansa
25 Dec - 01 Jan	British Airways
28 Dec - 04 Jan	Lufthansa
26 Dec - 02 Jan	Turkish Airlines
27 Dec - 03 Jan	Lufthansa

Also check the deals for one-way flights from Atlanta to Bucharest 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 Atlanta to Bucharest in December from $503

Return flights