| Royken to Oerlinghausen | 540.93 mi (870.54 km) |
| Royken to Oestrich-Winkel | 679.31 mi (1,093.24 km) |
| Royken to Offenburg | 784.86 mi (1,263.12 km) |
| Royken to Oftersheim | 719.75 mi (1,158.32 km) |
| Royken to Ohrdruf | 615.42 mi (990.43 km) |
| Royken to Ohringen | 728.74 mi (1,172.79 km) |
| Royken to Olbernhau | 636.69 mi (1,024.65 km) |
| Royken to Olching | 797.69 mi (1,283.76 km) |
| Royken to Oldenburg | 463.03 mi (745.18 km) |
| Royken to Oldenburg in Holstein | 375.81 mi (604.81 km) |
| Royken to Olfen | 566.30 mi (911.37 km) |
| Royken to Olpe | 610.72 mi (982.86 km) |
| Royken to Olsberg | 584.16 mi (940.11 km) |
| Royken to Oranienburg | 494.01 mi (795.03 km) |
| Royken to Ortenberg | 650.18 mi (1,046.37 km) |
