| Highgate to Oerlinghausen | 377.51 mi (607.54 km) |
| Highgate to Oestrich-Winkel | 371.75 mi (598.28 km) |
| Highgate to Offenburg | 417.54 mi (671.97 km) |
| Highgate to Oftersheim | 412.59 mi (663.99 km) |
| Highgate to Ohrdruf | 473.29 mi (761.68 km) |
| Highgate to Ohringen | 454.97 mi (732.21 km) |
| Highgate to Olbernhau | 587.03 mi (944.74 km) |
| Highgate to Olching | 560.10 mi (901.39 km) |
| Highgate to Oldenburg | 368.81 mi (593.55 km) |
| Highgate to Oldenburg in Holstein | 495.76 mi (797.85 km) |
| Highgate to Olfen | 322.78 mi (519.47 km) |
| Highgate to Olpe | 346.65 mi (557.88 km) |
| Highgate to Olsberg | 371.53 mi (597.91 km) |
| Highgate to Oranienburg | 572.16 mi (920.80 km) |
| Highgate to Ortenberg | 408.77 mi (657.86 km) |
