| Castellana Grotte to Nottingham | 1,194.59 mi (1,922.51 km) |
| Castellana Grotte to Nuneaton | 1,187.85 mi (1,911.66 km) |
| Castellana Grotte to Oadby | 1,177.53 mi (1,895.06 km) |
| Castellana Grotte to Oakengates | 1,228.58 mi (1,977.20 km) |
| Castellana Grotte to Oakham | 1,168.94 mi (1,881.23 km) |
| Castellana Grotte to Oldbury | 1,206.10 mi (1,941.03 km) |
| Castellana Grotte to Oldham | 1,251.06 mi (2,013.38 km) |
| Castellana Grotte to Ollerton | 1,200.65 mi (1,932.26 km) |
| Castellana Grotte to Olton | 1,196.17 mi (1,925.05 km) |
| Castellana Grotte to Omagh | 1,465.96 mi (2,359.24 km) |
| Castellana Grotte to Ormesby | 1,264.78 mi (2,035.46 km) |
| Castellana Grotte to Ormskirk | 1,277.56 mi (2,056.04 km) |
| Castellana Grotte to Orpington | 1,087.60 mi (1,750.32 km) |
| Castellana Grotte to Ossett | 1,239.20 mi (1,994.30 km) |
| Castellana Grotte to Oswaldtwistle | 1,268.31 mi (2,041.15 km) |
