AirHint found the following cheapest one-way flights from Washington (IAD) to Barcelona (BCN) in March 2026 (see full year).
One-Way flights
| 30 Mar | Aer Lingus | ||
| 11 Mar | Air Canada | ||
| 10 Mar | Air Canada | ||
| 29 Mar | Air Canada | ||
| 24 Mar | Air Canada | ||
| 31 Mar | Air Canada | ||
| 25 Mar | Air Canada | ||
| 26 Mar | Aer Lingus | ||
| 05 Mar | TAP | ||
| 11 Mar | Lufthansa | direct |
Also check the deals for return flights from Washington to Barcelona in March.
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