| Casamassima to Nottingham | 1,182.74 mi (1,903.43 km) |
| Casamassima to Nuneaton | 1,175.80 mi (1,892.27 km) |
| Casamassima to Oadby | 1,165.57 mi (1,875.80 km) |
| Casamassima to Oakengates | 1,216.45 mi (1,957.69 km) |
| Casamassima to Oakham | 1,157.05 mi (1,862.09 km) |
| Casamassima to Oldbury | 1,193.97 mi (1,921.51 km) |
| Casamassima to Oldham | 1,239.25 mi (1,994.38 km) |
| Casamassima to Ollerton | 1,188.90 mi (1,913.34 km) |
| Casamassima to Olton | 1,184.05 mi (1,905.54 km) |
| Casamassima to Omagh | 1,453.87 mi (2,339.77 km) |
| Casamassima to Ormesby | 1,253.45 mi (2,017.24 km) |
| Casamassima to Ormskirk | 1,265.66 mi (2,036.88 km) |
| Casamassima to Orpington | 1,075.39 mi (1,730.68 km) |
| Casamassima to Ossett | 1,227.52 mi (1,975.50 km) |
| Casamassima to Oswaldtwistle | 1,256.53 mi (2,022.19 km) |
