| Cal to Nottingham | 1,779.23 mi (2,863.39 km) |
| Cal to Nuneaton | 1,780.23 mi (2,865.01 km) |
| Cal to Oadby | 1,766.95 mi (2,843.63 km) |
| Cal to Oakengates | 1,822.98 mi (2,933.80 km) |
| Cal to Oakham | 1,755.59 mi (2,825.34 km) |
| Cal to Oldbury | 1,801.24 mi (2,898.81 km) |
| Cal to Oldham | 1,831.94 mi (2,948.22 km) |
| Cal to Ollerton | 1,781.01 mi (2,866.25 km) |
| Cal to Olton | 1,791.31 mi (2,882.84 km) |
| Cal to Omagh | 2,053.63 mi (3,305.00 km) |
| Cal to Ormesby | 1,826.00 mi (2,938.67 km) |
| Cal to Ormskirk | 1,861.75 mi (2,996.19 km) |
| Cal to Orpington | 1,688.99 mi (2,718.17 km) |
| Cal to Ossett | 1,815.43 mi (2,921.66 km) |
| Cal to Oswaldtwistle | 1,847.69 mi (2,973.57 km) |
