| Smethwick to Oerlinghausen | 451.13 mi (726.03 km) |
| Smethwick to Oestrich-Winkel | 463.80 mi (746.41 km) |
| Smethwick to Offenburg | 515.98 mi (830.38 km) |
| Smethwick to Oftersheim | 507.03 mi (815.99 km) |
| Smethwick to Ohrdruf | 555.62 mi (894.19 km) |
| Smethwick to Ohringen | 548.83 mi (883.25 km) |
| Smethwick to Olbernhau | 667.68 mi (1,074.52 km) |
| Smethwick to Olching | 655.24 mi (1,054.50 km) |
| Smethwick to Oldenburg | 427.18 mi (687.49 km) |
| Smethwick to Oldenburg in Holstein | 543.16 mi (874.14 km) |
| Smethwick to Olfen | 400.20 mi (644.06 km) |
| Smethwick to Olpe | 431.09 mi (693.78 km) |
| Smethwick to Olsberg | 451.91 mi (727.28 km) |
| Smethwick to Oranienburg | 636.83 mi (1,024.88 km) |
| Smethwick to Ortenberg | 496.79 mi (799.51 km) |
