| Les Clayes-sous-Bois to Oria | 957.14 mi (1,540.37 km) |
| Les Clayes-sous-Bois to Oristano | 696.46 mi (1,120.84 km) |
| Les Clayes-sous-Bois to Orta Nova | 844.27 mi (1,358.72 km) |
| Les Clayes-sous-Bois to Orte | 666.49 mi (1,072.62 km) |
| Les Clayes-sous-Bois to Ortona | 747.02 mi (1,202.22 km) |
| Les Clayes-sous-Bois to Orvieto | 643.99 mi (1,036.40 km) |
| Les Clayes-sous-Bois to Orzinuovi | 441.93 mi (711.21 km) |
| Les Clayes-sous-Bois to Osimo | 661.44 mi (1,064.48 km) |
| Les Clayes-sous-Bois to Ospitaletto | 441.46 mi (710.46 km) |
| Les Clayes-sous-Bois to Ostuni | 944.44 mi (1,519.94 km) |
| Les Clayes-sous-Bois to Ottaviano | 821.51 mi (1,322.10 km) |
| Les Clayes-sous-Bois to Ovada | 427.53 mi (688.04 km) |
| Les Clayes-sous-Bois to Ozieri | 664.65 mi (1,069.65 km) |
| Les Clayes-sous-Bois to Paceco | 915.73 mi (1,473.73 km) |
| Les Clayes-sous-Bois to Pachino | 1,065.47 mi (1,714.70 km) |
