| North Adams to Oerlinghausen | 3,677.24 mi (5,917.94 km) |
| North Adams to Oestrich-Winkel | 3,708.83 mi (5,968.79 km) |
| North Adams to Offenburg | 3,752.80 mi (6,039.55 km) |
| North Adams to Oftersheim | 3,751.40 mi (6,037.29 km) |
| North Adams to Ohrdruf | 3,791.60 mi (6,102.00 km) |
| North Adams to Ohringen | 3,793.55 mi (6,105.12 km) |
| North Adams to Olbernhau | 3,897.61 mi (6,272.60 km) |
| North Adams to Olching | 3,899.05 mi (6,274.91 km) |
| North Adams to Oldenburg | 3,626.57 mi (5,836.40 km) |
| North Adams to Oldenburg in Holstein | 3,693.65 mi (5,944.36 km) |
| North Adams to Olfen | 3,634.50 mi (5,849.16 km) |
| North Adams to Olpe | 3,672.22 mi (5,909.87 km) |
| North Adams to Olsberg | 3,688.03 mi (5,935.31 km) |
| North Adams to Oranienburg | 3,827.09 mi (6,159.11 km) |
| North Adams to Ortenberg | 3,740.14 mi (6,019.18 km) |
