| South Portland to Oswaldtwistle | 3,050.71 mi (4,909.64 km) |
| South Portland to Oswestry | 3,041.21 mi (4,894.36 km) |
| South Portland to Otley | 3,075.35 mi (4,949.30 km) |
| South Portland to Ovenden | 3,070.95 mi (4,942.22 km) |
| South Portland to Oxford | 3,136.36 mi (5,047.49 km) |
| South Portland to Oxted | 3,198.38 mi (5,147.29 km) |
| South Portland to Padbury | 3,144.00 mi (5,059.77 km) |
| South Portland to Padiham | 3,052.92 mi (4,913.20 km) |
| South Portland to Paignton | 3,069.91 mi (4,940.54 km) |
| South Portland to Paisley | 2,937.18 mi (4,726.94 km) |
| South Portland to Palmers Green | 3,185.94 mi (5,127.27 km) |
| South Portland to Parkstone | 3,130.95 mi (5,038.77 km) |
| South Portland to Partick | 2,941.05 mi (4,733.17 km) |
| South Portland to Patcham | 3,201.61 mi (5,152.50 km) |
| South Portland to Peebles | 2,986.98 mi (4,807.07 km) |
