| Barcelona to Noventa Vicentina | 541.49 mi (871.44 km) |
| Barcelona to Novi di Modena | 501.92 mi (807.76 km) |
| Barcelona to Novi Ligure | 406.84 mi (654.75 km) |
| Barcelona to Nuoro | 381.08 mi (613.30 km) |
| Barcelona to Occhiobello | 532.92 mi (857.66 km) |
| Barcelona to Oderzo | 598.42 mi (963.06 km) |
| Barcelona to Oggiono | 470.14 mi (756.61 km) |
| Barcelona to Olbia | 382.24 mi (615.15 km) |
| Barcelona to Oleggio | 435.23 mi (700.43 km) |
| Barcelona to Olgiate Comasco | 455.70 mi (733.38 km) |
| Barcelona to Olgiate Olona | 446.04 mi (717.83 km) |
| Barcelona to Omegna | 439.69 mi (707.60 km) |
| Barcelona to Opera | 448.46 mi (721.73 km) |
| Barcelona to Oppeano | 526.87 mi (847.92 km) |
| Barcelona to Orbassano | 368.11 mi (592.42 km) |
