AirHint found the following cheapest return flights from Chicago (ORD) to Bucharest (OTP) in May 2026 (see full year).
Return flights
| 02 May - 16 May | Turkish Airlines | ||
| 20 May - 27 May | Aer Lingus | ||
| 18 May - 25 May | Aer Lingus | ||
| 29 May - 12 Jun | Air Canada | ||
| 19 May - 26 May | Air France | ||
| 17 May - 24 May | Aer Lingus |
Also check the deals for one-way flights from Chicago to Bucharest in May.
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