| Trenton to Oerlinghausen | 3,853.59 mi (6,201.75 km) |
| Trenton to Oestrich-Winkel | 3,882.03 mi (6,247.52 km) |
| Trenton to Offenburg | 3,923.58 mi (6,314.39 km) |
| Trenton to Oftersheim | 3,923.91 mi (6,314.92 km) |
| Trenton to Ohrdruf | 3,967.21 mi (6,384.60 km) |
| Trenton to Ohringen | 3,966.24 mi (6,383.05 km) |
| Trenton to Olbernhau | 4,074.12 mi (6,556.66 km) |
| Trenton to Olching | 4,071.17 mi (6,551.91 km) |
| Trenton to Oldenburg | 3,804.37 mi (6,122.54 km) |
| Trenton to Oldenburg in Holstein | 3,873.79 mi (6,234.26 km) |
| Trenton to Olfen | 3,809.99 mi (6,131.59 km) |
| Trenton to Olpe | 3,846.87 mi (6,190.94 km) |
| Trenton to Olsberg | 3,863.43 mi (6,217.60 km) |
| Trenton to Oranienburg | 4,006.16 mi (6,447.30 km) |
| Trenton to Ortenberg | 3,914.35 mi (6,299.54 km) |
