| Islington to Orbetello | 822.77 mi (1,324.11 km) |
| Islington to Oria | 1,137.48 mi (1,830.60 km) |
| Islington to Oristano | 905.42 mi (1,457.13 km) |
| Islington to Orta Nova | 1,027.90 mi (1,654.25 km) |
| Islington to Orte | 858.04 mi (1,380.89 km) |
| Islington to Ortona | 930.42 mi (1,497.37 km) |
| Islington to Orvieto | 835.36 mi (1,344.38 km) |
| Islington to Orzinuovi | 624.72 mi (1,005.39 km) |
| Islington to Osimo | 841.48 mi (1,354.24 km) |
| Islington to Ospitaletto | 621.74 mi (1,000.59 km) |
| Islington to Ostuni | 1,123.77 mi (1,808.54 km) |
| Islington to Ottaviano | 1,012.31 mi (1,629.16 km) |
| Islington to Ovada | 624.12 mi (1,004.42 km) |
| Islington to Ozieri | 872.50 mi (1,404.15 km) |
| Islington to Paceco | 1,120.38 mi (1,803.08 km) |
