| Castelnau-le-Lez to Nottingham | 683.88 mi (1,100.60 km) |
| Castelnau-le-Lez to Nuneaton | 661.66 mi (1,064.84 km) |
| Castelnau-le-Lez to Oadby | 660.01 mi (1,062.18 km) |
| Castelnau-le-Lez to Oakengates | 690.29 mi (1,110.92 km) |
| Castelnau-le-Lez to Oakham | 659.37 mi (1,061.15 km) |
| Castelnau-le-Lez to Oldbury | 670.33 mi (1,078.79 km) |
| Castelnau-le-Lez to Oldham | 737.09 mi (1,186.23 km) |
| Castelnau-le-Lez to Ollerton | 697.81 mi (1,123.02 km) |
| Castelnau-le-Lez to Olton | 662.28 mi (1,065.83 km) |
| Castelnau-le-Lez to Omagh | 908.05 mi (1,461.36 km) |
| Castelnau-le-Lez to Ormesby | 787.75 mi (1,267.76 km) |
| Castelnau-le-Lez to Ormskirk | 752.11 mi (1,210.40 km) |
| Castelnau-le-Lez to Orpington | 563.09 mi (906.21 km) |
| Castelnau-le-Lez to Ossett | 737.09 mi (1,186.23 km) |
| Castelnau-le-Lez to Oswaldtwistle | 754.26 mi (1,213.87 km) |
