| Forfar to Oerlinghausen | 565.81 mi (910.58 km) |
| Forfar to Oestrich-Winkel | 640.97 mi (1,031.53 km) |
| Forfar to Offenburg | 723.44 mi (1,164.26 km) |
| Forfar to Oftersheim | 691.14 mi (1,112.28 km) |
| Forfar to Ohrdruf | 684.61 mi (1,101.77 km) |
| Forfar to Ohringen | 726.54 mi (1,169.25 km) |
| Forfar to Olbernhau | 779.27 mi (1,254.11 km) |
| Forfar to Olching | 832.81 mi (1,340.27 km) |
| Forfar to Oldenburg | 502.26 mi (808.31 km) |
| Forfar to Oldenburg in Holstein | 562.02 mi (904.49 km) |
| Forfar to Olfen | 536.10 mi (862.76 km) |
| Forfar to Olpe | 583.91 mi (939.71 km) |
| Forfar to Olsberg | 587.92 mi (946.16 km) |
| Forfar to Oranienburg | 695.57 mi (1,119.41 km) |
| Forfar to Ortenberg | 653.91 mi (1,052.36 km) |
