Cheapest return flights from Chicago to Bucharest in December from 491€

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

Return flights

29 Dec - 12 Jan Lufthansa
07 Dec - 21 Dec Lufthansa
23 Dec - 17 Jan Frontier Airlines
26 Dec - 09 Jan Spirit Airlines
17 Dec - 10 Jan Icelandair
16 Dec - 29 Dec Spirit Airlines
17 Dec - 29 Dec Icelandair
17 Dec - 27 Dec Icelandair
11 Dec - 02 Jan Spirit Airlines
12 Dec - 02 Jan Frontier Airlines
13 Dec - 04 Jan Frontier Airlines
21 Dec - 10 Jan Frontier Airlines
11 Dec - 03 Jan Spirit Airlines
10 Dec - 03 Jan Spirit Airlines
18 Dec - 27 Dec Spirit Airlines
19 Dec - 27 Dec Spirit Airlines
20 Dec - 27 Dec Spirit Airlines

Also check the deals for one-way flights from Chicago to Bucharest in December.

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