| Marinha Grande to Nottingham | 983.49 mi (1,582.78 km) |
| Marinha Grande to Nuneaton | 950.93 mi (1,530.37 km) |
| Marinha Grande to Oadby | 962.70 mi (1,549.31 km) |
| Marinha Grande to Oakengates | 945.62 mi (1,521.82 km) |
| Marinha Grande to Oakham | 973.52 mi (1,566.73 km) |
| Marinha Grande to Oldbury | 940.42 mi (1,513.46 km) |
| Marinha Grande to Oldham | 1,005.31 mi (1,617.90 km) |
| Marinha Grande to Ollerton | 1,001.22 mi (1,611.31 km) |
| Marinha Grande to Olton | 939.69 mi (1,512.28 km) |
| Marinha Grande to Omagh | 1,028.17 mi (1,654.68 km) |
| Marinha Grande to Ormesby | 1,083.88 mi (1,744.34 km) |
| Marinha Grande to Ormskirk | 995.86 mi (1,602.69 km) |
| Marinha Grande to Orpington | 912.71 mi (1,468.86 km) |
| Marinha Grande to Ossett | 1,022.24 mi (1,645.14 km) |
| Marinha Grande to Oswaldtwistle | 1,014.14 mi (1,632.09 km) |
