| Hockessin to Orbetello | 4,314.83 mi (6,944.04 km) |
| Hockessin to Oria | 4,667.63 mi (7,511.83 km) |
| Hockessin to Oristano | 4,284.41 mi (6,895.10 km) |
| Hockessin to Orta Nova | 4,552.25 mi (7,326.14 km) |
| Hockessin to Orte | 4,365.74 mi (7,025.97 km) |
| Hockessin to Ortona | 4,457.62 mi (7,173.85 km) |
| Hockessin to Orvieto | 4,344.60 mi (6,991.96 km) |
| Hockessin to Orzinuovi | 4,159.86 mi (6,694.65 km) |
| Hockessin to Osimo | 4,377.39 mi (7,044.73 km) |
| Hockessin to Ospitaletto | 4,160.81 mi (6,696.18 km) |
| Hockessin to Ostuni | 4,656.48 mi (7,493.88 km) |
| Hockessin to Ottaviano | 4,515.89 mi (7,267.62 km) |
| Hockessin to Ovada | 4,128.87 mi (6,644.77 km) |
| Hockessin to Ozieri | 4,279.81 mi (6,887.68 km) |
| Hockessin to Paceco | 4,535.14 mi (7,298.60 km) |
