| Hays to Orbetello | 5,331.85 mi (8,580.78 km) |
| Hays to Oria | 5,664.94 mi (9,116.84 km) |
| Hays to Oristano | 5,344.23 mi (8,600.71 km) |
| Hays to Orta Nova | 5,553.35 mi (8,937.26 km) |
| Hays to Orte | 5,375.39 mi (8,650.85 km) |
| Hays to Ortona | 5,455.89 mi (8,780.40 km) |
| Hays to Orvieto | 5,353.02 mi (8,614.86 km) |
| Hays to Orzinuovi | 5,149.66 mi (8,287.58 km) |
| Hays to Osimo | 5,368.52 mi (8,639.80 km) |
| Hays to Ospitaletto | 5,147.88 mi (8,284.72 km) |
| Hays to Ostuni | 5,651.60 mi (9,095.38 km) |
| Hays to Ottaviano | 5,530.22 mi (8,900.02 km) |
| Hays to Ovada | 5,135.33 mi (8,264.51 km) |
| Hays to Ozieri | 5,330.13 mi (8,578.01 km) |
| Hays to Paceco | 5,591.30 mi (8,998.33 km) |
