Cheapest return flights from Chicago to Bucharest in December from 435€

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

Return flights

07 Dec - 23 Dec Lufthansa
29 Dec - 12 Jan Lufthansa
05 Dec - 07 Dec KLM
08 Dec - 07 Jan SWISS
23 Dec - 15 Jan Spirit Airlines
23 Dec - 11 Jan Spirit Airlines
12 Dec - 14 Dec Lufthansa
22 Dec - 15 Jan Frontier Airlines
21 Dec - 15 Jan Icelandair
13 Dec - 04 Jan Frontier Airlines
27 Dec - 04 Jan Air Serbia
26 Dec - 04 Jan Frontier Airlines
26 Dec - 02 Jan Lufthansa

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

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