| Hammersmith to Oerlinghausen | 381.59 mi (614.11 km) |
| Hammersmith to Oestrich-Winkel | 373.77 mi (601.52 km) |
| Hammersmith to Offenburg | 418.03 mi (672.76 km) |
| Hammersmith to Oftersheim | 414.12 mi (666.47 km) |
| Hammersmith to Ohrdruf | 476.49 mi (766.83 km) |
| Hammersmith to Ohringen | 456.60 mi (734.83 km) |
| Hammersmith to Olbernhau | 590.34 mi (950.06 km) |
| Hammersmith to Olching | 561.42 mi (903.52 km) |
| Hammersmith to Oldenburg | 373.88 mi (601.70 km) |
| Hammersmith to Oldenburg in Holstein | 501.22 mi (806.63 km) |
| Hammersmith to Olfen | 326.62 mi (525.64 km) |
| Hammersmith to Olpe | 349.74 mi (562.85 km) |
| Hammersmith to Olsberg | 375.02 mi (603.54 km) |
| Hammersmith to Oranienburg | 576.71 mi (928.12 km) |
| Hammersmith to Ortenberg | 411.36 mi (662.02 km) |
