| Borehamwood to Oerlinghausen | 382.19 mi (615.08 km) |
| Borehamwood to Oestrich-Winkel | 378.51 mi (609.15 km) |
| Borehamwood to Offenburg | 425.16 mi (684.24 km) |
| Borehamwood to Oftersheim | 419.66 mi (675.37 km) |
| Borehamwood to Ohrdruf | 478.99 mi (770.85 km) |
| Borehamwood to Ohringen | 461.98 mi (743.49 km) |
| Borehamwood to Olbernhau | 592.61 mi (953.72 km) |
| Borehamwood to Olching | 567.29 mi (912.97 km) |
| Borehamwood to Oldenburg | 371.93 mi (598.57 km) |
| Borehamwood to Oldenburg in Holstein | 498.03 mi (801.50 km) |
| Borehamwood to Olfen | 327.80 mi (527.54 km) |
| Borehamwood to Olpe | 352.48 mi (567.27 km) |
| Borehamwood to Olsberg | 376.93 mi (606.62 km) |
| Borehamwood to Oranienburg | 576.13 mi (927.19 km) |
| Borehamwood to Ortenberg | 415.07 mi (667.99 km) |
