| Uniondale to Oerlinghausen | 3,785.06 mi (6,091.47 km) |
| Uniondale to Oestrich-Winkel | 3,812.91 mi (6,136.28 km) |
| Uniondale to Offenburg | 3,854.11 mi (6,202.58 km) |
| Uniondale to Oftersheim | 3,854.68 mi (6,203.51 km) |
| Uniondale to Ohrdruf | 3,898.52 mi (6,274.06 km) |
| Uniondale to Ohringen | 3,897.04 mi (6,271.68 km) |
| Uniondale to Olbernhau | 4,005.61 mi (6,446.41 km) |
| Uniondale to Olching | 4,001.87 mi (6,440.39 km) |
| Uniondale to Oldenburg | 3,736.19 mi (6,012.81 km) |
| Uniondale to Oldenburg in Holstein | 3,806.26 mi (6,125.58 km) |
| Uniondale to Olfen | 3,741.29 mi (6,021.02 km) |
| Uniondale to Olpe | 3,778.00 mi (6,080.11 km) |
| Uniondale to Olsberg | 3,794.71 mi (6,106.99 km) |
| Uniondale to Oranienburg | 3,938.31 mi (6,338.09 km) |
| Uniondale to Ortenberg | 3,845.40 mi (6,188.57 km) |
