AirHint found the following cheapest one-way flights from Chicago (ORD) to Barcelona (BCN) in March 2026 (see full year).
One-Way flights
| 05 Mar | Frontier Airlines | ||
| 30 Mar | Aer Lingus | ||
| 14 Mar | Scandinavian Airlines | ||
| 06 Mar | TAP | ||
| 30 Mar | Iberia | direct |
Also check the deals for return flights from Chicago to Barcelona in March.
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