| Essex to Orbetello | 4,367.16 mi (7,028.26 km) |
| Essex to Oria | 4,720.04 mi (7,596.17 km) |
| Essex to Oristano | 4,336.34 mi (6,978.67 km) |
| Essex to Orta Nova | 4,604.65 mi (7,410.47 km) |
| Essex to Orte | 4,418.11 mi (7,110.26 km) |
| Essex to Ortona | 4,510.04 mi (7,258.22 km) |
| Essex to Orvieto | 4,396.98 mi (7,076.26 km) |
| Essex to Orzinuovi | 4,212.35 mi (6,779.12 km) |
| Essex to Osimo | 4,429.86 mi (7,129.17 km) |
| Essex to Ospitaletto | 4,213.31 mi (6,780.67 km) |
| Essex to Ostuni | 4,708.90 mi (7,578.24 km) |
| Essex to Ottaviano | 4,568.21 mi (7,351.82 km) |
| Essex to Ovada | 4,181.28 mi (6,729.13 km) |
| Essex to Ozieri | 4,331.85 mi (6,971.44 km) |
| Essex to Paceco | 4,587.06 mi (7,382.16 km) |
