Cheapest return ORD–OTP flights, May

AirHint found the following cheapest return flights from Chicago (ORD) to Bucharest (OTP) in May 2026 (see full year).

Return flights

04 May - 11 May Frontier Airlines
06 May - 13 May KLM
01 May - 08 May Spirit Airlines
02 May - 09 May KLM
05 May - 12 May jetBlue
03 May - 10 May KLM
07 May - 14 May jetBlue
19 May - 02 Jun British Airways
09 May - 23 May Spirit Airlines
11 May - 14 May Condor
12 May - 14 May Spirit Airlines

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

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