| Mason City to Oswaldtwistle | 3,934.73 mi (6,332.34 km) |
| Mason City to Oswestry | 3,941.09 mi (6,342.57 km) |
| Mason City to Otley | 3,954.21 mi (6,363.68 km) |
| Mason City to Ovenden | 3,953.02 mi (6,361.76 km) |
| Mason City to Oxford | 4,045.28 mi (6,510.25 km) |
| Mason City to Oxted | 4,109.05 mi (6,612.88 km) |
| Mason City to Padbury | 4,048.57 mi (6,515.54 km) |
| Mason City to Padiham | 3,935.81 mi (6,334.07 km) |
| Mason City to Paignton | 4,006.29 mi (6,447.49 km) |
| Mason City to Paisley | 3,794.74 mi (6,107.04 km) |
| Mason City to Palmers Green | 4,092.03 mi (6,585.49 km) |
| Mason City to Parkstone | 4,057.14 mi (6,529.34 km) |
| Mason City to Partick | 3,797.82 mi (6,112.01 km) |
| Mason City to Patcham | 4,118.28 mi (6,627.74 km) |
| Mason City to Peebles | 3,843.53 mi (6,185.56 km) |
