| Nikaia to Oerlinghausen | 1,207.80 mi (1,943.77 km) |
| Nikaia to Oestrich-Winkel | 1,133.61 mi (1,824.37 km) |
| Nikaia to Offenburg | 1,069.13 mi (1,720.60 km) |
| Nikaia to Oftersheim | 1,085.34 mi (1,746.68 km) |
| Nikaia to Ohrdruf | 1,089.87 mi (1,753.97 km) |
| Nikaia to Ohringen | 1,046.70 mi (1,684.50 km) |
| Nikaia to Olbernhau | 1,012.32 mi (1,629.18 km) |
| Nikaia to Olching | 939.04 mi (1,511.24 km) |
| Nikaia to Oldenburg | 1,281.01 mi (2,061.59 km) |
| Nikaia to Oldenburg in Holstein | 1,278.54 mi (2,057.61 km) |
| Nikaia to Olfen | 1,233.74 mi (1,985.52 km) |
| Nikaia to Olpe | 1,186.30 mi (1,909.17 km) |
| Nikaia to Olsberg | 1,182.34 mi (1,902.79 km) |
| Nikaia to Oranienburg | 1,136.90 mi (1,829.66 km) |
| Nikaia to Ortenberg | 1,116.10 mi (1,796.19 km) |
