| Grasse to Oestrich-Winkel | 440.56 mi (709.01 km) |
| Grasse to Offenburg | 335.20 mi (539.45 km) |
| Grasse to Oftersheim | 401.97 mi (646.91 km) |
| Grasse to Ohrdruf | 526.00 mi (846.51 km) |
| Grasse to Ohringen | 401.55 mi (646.24 km) |
| Grasse to Olbernhau | 569.40 mi (916.36 km) |
| Grasse to Olching | 377.76 mi (607.95 km) |
| Grasse to Oldenburg | 657.48 mi (1,058.11 km) |
| Grasse to Oldenburg in Holstein | 756.08 mi (1,216.79 km) |
| Grasse to Olfen | 556.62 mi (895.80 km) |
| Grasse to Olpe | 509.63 mi (820.18 km) |
| Grasse to Olsberg | 535.84 mi (862.35 km) |
| Grasse to Oranienburg | 691.41 mi (1,112.72 km) |
| Grasse to Ortenberg | 472.97 mi (761.17 km) |
| Grasse to Oschatz | 600.94 mi (967.12 km) |
