| Thatto Heath to Orbetello | 993.80 mi (1,599.37 km) |
| Thatto Heath to Oria | 1,303.68 mi (2,098.07 km) |
| Thatto Heath to Oristano | 1,075.40 mi (1,730.69 km) |
| Thatto Heath to Orta Nova | 1,195.45 mi (1,923.89 km) |
| Thatto Heath to Orte | 1,028.08 mi (1,654.54 km) |
| Thatto Heath to Ortona | 1,098.16 mi (1,767.32 km) |
| Thatto Heath to Orvieto | 1,005.40 mi (1,618.03 km) |
| Thatto Heath to Orzinuovi | 793.51 mi (1,277.02 km) |
| Thatto Heath to Osimo | 1,008.53 mi (1,623.07 km) |
| Thatto Heath to Ospitaletto | 789.95 mi (1,271.30 km) |
| Thatto Heath to Ostuni | 1,289.66 mi (2,075.51 km) |
| Thatto Heath to Ottaviano | 1,181.93 mi (1,902.13 km) |
| Thatto Heath to Ovada | 795.38 mi (1,280.03 km) |
| Thatto Heath to Ozieri | 1,043.32 mi (1,679.06 km) |
| Thatto Heath to Paceco | 1,291.97 mi (2,079.22 km) |
