| Otopeni to Olivenza | 1,747.73 mi (2,812.70 km) |
| Otopeni to Olot | 1,191.46 mi (1,917.48 km) |
| Otopeni to Onate | 1,417.43 mi (2,281.13 km) |
| Otopeni to Onda | 1,377.00 mi (2,216.06 km) |
| Otopeni to Onteniente | 1,425.06 mi (2,293.41 km) |
| Otopeni to Orihuela | 1,463.60 mi (2,355.44 km) |
| Otopeni to Osuna | 1,692.93 mi (2,724.50 km) |
| Otopeni to Ourense | 1,696.84 mi (2,730.80 km) |
| Otopeni to Oviedo | 1,579.43 mi (2,541.85 km) |
| Otopeni to Paiporta | 1,398.79 mi (2,251.13 km) |
| Otopeni to Pajara | 2,464.71 mi (3,966.57 km) |
| Otopeni to Palafolls | 1,188.77 mi (1,913.15 km) |
| Otopeni to Palafrugell | 1,163.42 mi (1,872.34 km) |
| Otopeni to Palamos | 1,166.53 mi (1,877.36 km) |
| Otopeni to Palencia | 1,540.08 mi (2,478.53 km) |
