AirHint found the following cheapest one-way flights from Chicago (ORD) to Madrid (MAD) in May 2026 (see full year).
One-Way flights
| 07 May | WestJet | ||
| 30 May | TAP | ||
| 29 May | TAP | ||
| 07 May | British Airways | direct | |
| 30 May | British Airways | direct | |
| 29 May | Iberia | direct |
Also check the deals for return flights from Chicago to Madrid in May.
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