AirHint found the following cheapest return flights from Chicago (ORD) to Istanbul (IST) in April 2026 (see full year).
Return flights
| 29 Apr - 13 May | Scandinavian Airlines | ||
| 05 Apr - 12 Apr | Turkish Airlines | direct | |
| 26 Apr - 10 May | British Airways | ||
| 29 Apr - 13 May | Turkish Airlines | direct | |
| 26 Apr - 10 May | Turkish Airlines | direct |
Also check the deals for one-way flights from Chicago to Istanbul in April.
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