| Iselin to Orbetello | 4,224.81 mi (6,799.18 km) |
| Iselin to Oria | 4,577.53 mi (7,366.83 km) |
| Iselin to Oristano | 4,194.95 mi (6,751.12 km) |
| Iselin to Orta Nova | 4,462.16 mi (7,181.15 km) |
| Iselin to Orte | 4,275.67 mi (6,881.03 km) |
| Iselin to Ortona | 4,367.50 mi (7,028.81 km) |
| Iselin to Orvieto | 4,254.53 mi (6,847.00 km) |
| Iselin to Orzinuovi | 4,069.68 mi (6,549.52 km) |
| Iselin to Osimo | 4,287.23 mi (6,899.63 km) |
| Iselin to Ospitaletto | 4,070.63 mi (6,551.04 km) |
| Iselin to Ostuni | 4,566.36 mi (7,348.85 km) |
| Iselin to Ottaviano | 4,425.88 mi (7,122.77 km) |
| Iselin to Ovada | 4,038.75 mi (6,499.74 km) |
| Iselin to Ozieri | 4,190.18 mi (6,743.44 km) |
| Iselin to Paceco | 4,445.68 mi (7,154.63 km) |
