| Gaithersburg to Oswaldtwistle | 3,525.10 mi (5,673.10 km) |
| Gaithersburg to Oswestry | 3,515.41 mi (5,657.50 km) |
| Gaithersburg to Otley | 3,549.75 mi (5,712.77 km) |
| Gaithersburg to Ovenden | 3,545.35 mi (5,705.68 km) |
| Gaithersburg to Oxford | 3,610.25 mi (5,810.13 km) |
| Gaithersburg to Oxted | 3,672.14 mi (5,909.74 km) |
| Gaithersburg to Padbury | 3,618.01 mi (5,822.62 km) |
| Gaithersburg to Padiham | 3,527.32 mi (5,676.67 km) |
| Gaithersburg to Paignton | 3,542.53 mi (5,701.16 km) |
| Gaithersburg to Paisley | 3,411.29 mi (5,489.94 km) |
| Gaithersburg to Palmers Green | 3,659.87 mi (5,889.99 km) |
| Gaithersburg to Parkstone | 3,604.08 mi (5,800.21 km) |
| Gaithersburg to Partick | 3,415.14 mi (5,496.14 km) |
| Gaithersburg to Patcham | 3,675.13 mi (5,914.55 km) |
| Gaithersburg to Peebles | 3,461.10 mi (5,570.10 km) |
