| Trecastagni to Nottingham | 1,314.67 mi (2,115.75 km) |
| Trecastagni to Nuneaton | 1,302.28 mi (2,095.82 km) |
| Trecastagni to Oadby | 1,294.66 mi (2,083.56 km) |
| Trecastagni to Oakengates | 1,339.90 mi (2,156.35 km) |
| Trecastagni to Oakham | 1,288.51 mi (2,073.65 km) |
| Trecastagni to Oldbury | 1,317.66 mi (2,120.57 km) |
| Trecastagni to Oldham | 1,371.80 mi (2,207.70 km) |
| Trecastagni to Ollerton | 1,323.62 mi (2,130.15 km) |
| Trecastagni to Olton | 1,308.10 mi (2,105.19 km) |
| Trecastagni to Omagh | 1,575.04 mi (2,534.78 km) |
| Trecastagni to Ormesby | 1,398.35 mi (2,250.42 km) |
| Trecastagni to Ormskirk | 1,394.98 mi (2,245.01 km) |
| Trecastagni to Orpington | 1,198.82 mi (1,929.31 km) |
| Trecastagni to Ossett | 1,363.67 mi (2,194.62 km) |
| Trecastagni to Oswaldtwistle | 1,389.54 mi (2,236.24 km) |
