| Porvoo to Nottingham | 1,129.45 mi (1,817.68 km) |
| Porvoo to Nuneaton | 1,158.28 mi (1,864.07 km) |
| Porvoo to Oadby | 1,142.16 mi (1,838.13 km) |
| Porvoo to Oakengates | 1,183.34 mi (1,904.41 km) |
| Porvoo to Oakham | 1,127.83 mi (1,815.06 km) |
| Porvoo to Oldbury | 1,177.07 mi (1,894.32 km) |
| Porvoo to Oldham | 1,137.16 mi (1,830.08 km) |
| Porvoo to Ollerton | 1,114.82 mi (1,794.14 km) |
| Porvoo to Olton | 1,173.06 mi (1,887.86 km) |
| Porvoo to Omagh | 1,272.05 mi (2,047.16 km) |
| Porvoo to Ormesby | 1,066.65 mi (1,716.61 km) |
| Porvoo to Ormskirk | 1,162.01 mi (1,870.07 km) |
| Porvoo to Orpington | 1,159.12 mi (1,865.42 km) |
| Porvoo to Ossett | 1,113.80 mi (1,792.49 km) |
| Porvoo to Oswaldtwistle | 1,138.45 mi (1,832.16 km) |
