| Williston to Orbetello | 5,028.26 mi (8,092.20 km) |
| Williston to Oria | 5,336.92 mi (8,588.94 km) |
| Williston to Oristano | 5,075.89 mi (8,168.85 km) |
| Williston to Orta Nova | 5,231.25 mi (8,418.88 km) |
| Williston to Orte | 5,064.80 mi (8,151.01 km) |
| Williston to Ortona | 5,134.34 mi (8,262.91 km) |
| Williston to Orvieto | 5,042.12 mi (8,114.51 km) |
| Williston to Orzinuovi | 4,830.56 mi (7,774.04 km) |
| Williston to Osimo | 5,044.08 mi (8,117.66 km) |
| Williston to Ospitaletto | 4,826.82 mi (7,768.02 km) |
| Williston to Ostuni | 5,322.31 mi (8,565.43 km) |
| Williston to Ottaviano | 5,218.95 mi (8,399.10 km) |
| Williston to Ovada | 4,829.23 mi (7,771.90 km) |
| Williston to Ozieri | 5,053.94 mi (8,133.53 km) |
| Williston to Paceco | 5,312.93 mi (8,550.33 km) |
