| Castelnaudary to Nottingham | 680.77 mi (1,095.59 km) |
| Castelnaudary to Nuneaton | 655.24 mi (1,054.51 km) |
| Castelnaudary to Oadby | 656.22 mi (1,056.09 km) |
| Castelnaudary to Oakengates | 678.80 mi (1,092.42 km) |
| Castelnaudary to Oakham | 657.90 mi (1,058.79 km) |
| Castelnaudary to Oldbury | 660.58 mi (1,063.10 km) |
| Castelnaudary to Oldham | 730.49 mi (1,175.61 km) |
| Castelnaudary to Ollerton | 696.18 mi (1,120.40 km) |
| Castelnaudary to Olton | 653.51 mi (1,051.73 km) |
| Castelnaudary to Omagh | 882.84 mi (1,420.80 km) |
| Castelnaudary to Ormesby | 788.73 mi (1,269.34 km) |
| Castelnaudary to Ormskirk | 741.61 mi (1,193.50 km) |
| Castelnaudary to Orpington | 563.30 mi (906.55 km) |
| Castelnaudary to Ossett | 733.75 mi (1,180.86 km) |
| Castelnaudary to Oswaldtwistle | 746.88 mi (1,201.99 km) |
