| Tonypandy to Orbetello | 934.62 mi (1,504.12 km) |
| Tonypandy to Oria | 1,262.06 mi (2,031.09 km) |
| Tonypandy to Oristano | 993.35 mi (1,598.64 km) |
| Tonypandy to Orta Nova | 1,150.31 mi (1,851.24 km) |
| Tonypandy to Orte | 974.48 mi (1,568.27 km) |
| Tonypandy to Ortona | 1,052.82 mi (1,694.36 km) |
| Tonypandy to Orvieto | 951.92 mi (1,531.97 km) |
| Tonypandy to Orzinuovi | 746.60 mi (1,201.54 km) |
| Tonypandy to Osimo | 965.69 mi (1,554.13 km) |
| Tonypandy to Ospitaletto | 745.01 mi (1,198.97 km) |
| Tonypandy to Ostuni | 1,248.92 mi (2,009.94 km) |
| Tonypandy to Ottaviano | 1,129.49 mi (1,817.74 km) |
| Tonypandy to Ovada | 735.91 mi (1,184.33 km) |
| Tonypandy to Ozieri | 965.48 mi (1,553.80 km) |
| Tonypandy to Paceco | 1,220.60 mi (1,964.37 km) |
