| Saint Austell to Orbetello | 934.68 mi (1,504.23 km) |
| Saint Austell to Oria | 1,274.84 mi (2,051.66 km) |
| Saint Austell to Oristano | 969.34 mi (1,560.00 km) |
| Saint Austell to Orta Nova | 1,160.91 mi (1,868.30 km) |
| Saint Austell to Orte | 979.29 mi (1,576.02 km) |
| Saint Austell to Ortona | 1,064.22 mi (1,712.70 km) |
| Saint Austell to Orvieto | 957.13 mi (1,540.36 km) |
| Saint Austell to Orzinuovi | 761.20 mi (1,225.03 km) |
| Saint Austell to Osimo | 980.32 mi (1,577.67 km) |
| Saint Austell to Ospitaletto | 761.38 mi (1,225.32 km) |
| Saint Austell to Ostuni | 1,262.57 mi (2,031.91 km) |
| Saint Austell to Ottaviano | 1,133.70 mi (1,824.51 km) |
| Saint Austell to Ovada | 739.06 mi (1,189.40 km) |
| Saint Austell to Ozieri | 946.34 mi (1,522.99 km) |
| Saint Austell to Paceco | 1,205.77 mi (1,940.49 km) |
