| Portimao to Nottingham | 1,149.30 mi (1,849.63 km) |
| Portimao to Nuneaton | 1,116.79 mi (1,797.29 km) |
| Portimao to Oadby | 1,127.60 mi (1,814.69 km) |
| Portimao to Oakengates | 1,114.46 mi (1,793.55 km) |
| Portimao to Oakham | 1,137.59 mi (1,830.78 km) |
| Portimao to Oldbury | 1,107.78 mi (1,782.80 km) |
| Portimao to Oldham | 1,174.58 mi (1,890.30 km) |
| Portimao to Ollerton | 1,167.15 mi (1,878.35 km) |
| Portimao to Olton | 1,106.34 mi (1,780.49 km) |
| Portimao to Omagh | 1,207.34 mi (1,943.02 km) |
| Portimao to Ormesby | 1,252.44 mi (2,015.61 km) |
| Portimao to Ormskirk | 1,166.95 mi (1,878.03 km) |
| Portimao to Orpington | 1,070.77 mi (1,723.23 km) |
| Portimao to Ossett | 1,190.42 mi (1,915.79 km) |
| Portimao to Oswaldtwistle | 1,184.32 mi (1,905.98 km) |
