| Notodden to Oerlinghausen | 529.83 mi (852.68 km) |
| Notodden to Oestrich-Winkel | 666.99 mi (1,073.41 km) |
| Notodden to Offenburg | 772.92 mi (1,243.89 km) |
| Notodden to Oftersheim | 709.22 mi (1,141.39 km) |
| Notodden to Ohrdruf | 611.09 mi (983.46 km) |
| Notodden to Ohringen | 720.71 mi (1,159.87 km) |
| Notodden to Olbernhau | 640.18 mi (1,030.27 km) |
| Notodden to Olching | 794.31 mi (1,278.32 km) |
| Notodden to Oldenburg | 449.65 mi (723.64 km) |
| Notodden to Oldenburg in Holstein | 373.67 mi (601.36 km) |
| Notodden to Olfen | 551.18 mi (887.04 km) |
| Notodden to Olpe | 597.44 mi (961.48 km) |
| Notodden to Olsberg | 572.71 mi (921.69 km) |
| Notodden to Oranienburg | 499.60 mi (804.03 km) |
| Notodden to Ortenberg | 640.77 mi (1,031.21 km) |
