| Great Cornard to Oerlinghausen | 336.66 mi (541.81 km) |
| Great Cornard to Oestrich-Winkel | 344.62 mi (554.61 km) |
| Great Cornard to Offenburg | 401.15 mi (645.59 km) |
| Great Cornard to Oftersheim | 388.56 mi (625.32 km) |
| Great Cornard to Ohrdruf | 437.58 mi (704.22 km) |
| Great Cornard to Ohringen | 430.05 mi (692.09 km) |
| Great Cornard to Olbernhau | 550.39 mi (885.76 km) |
| Great Cornard to Olching | 536.89 mi (864.04 km) |
| Great Cornard to Oldenburg | 322.59 mi (519.16 km) |
| Great Cornard to Oldenburg in Holstein | 447.77 mi (720.61 km) |
| Great Cornard to Olfen | 283.69 mi (456.56 km) |
| Great Cornard to Olpe | 312.26 mi (502.53 km) |
| Great Cornard to Olsberg | 334.36 mi (538.11 km) |
| Great Cornard to Oranienburg | 528.28 mi (850.19 km) |
| Great Cornard to Ortenberg | 377.44 mi (607.43 km) |
