| Northallerton to Orbetello | 1,002.83 mi (1,613.90 km) |
| Northallerton to Oria | 1,298.72 mi (2,090.09 km) |
| Northallerton to Oristano | 1,100.30 mi (1,770.76 km) |
| Northallerton to Orta Nova | 1,193.46 mi (1,920.69 km) |
| Northallerton to Orte | 1,032.99 mi (1,662.44 km) |
| Northallerton to Ortona | 1,096.95 mi (1,765.37 km) |
| Northallerton to Orvieto | 1,010.41 mi (1,626.10 km) |
| Northallerton to Orzinuovi | 796.35 mi (1,281.60 km) |
| Northallerton to Osimo | 1,006.35 mi (1,619.56 km) |
| Northallerton to Ospitaletto | 791.54 mi (1,273.86 km) |
| Northallerton to Ostuni | 1,284.19 mi (2,066.71 km) |
| Northallerton to Ottaviano | 1,184.97 mi (1,907.02 km) |
| Northallerton to Ovada | 806.67 mi (1,298.21 km) |
| Northallerton to Ozieri | 1,065.28 mi (1,714.41 km) |
| Northallerton to Paceco | 1,307.76 mi (2,104.64 km) |
