| Gaithersburg to Rhondda | 3,524.68 mi (5,672.42 km) |
| Gaithersburg to Rhosllanerchrugog | 3,512.63 mi (5,653.04 km) |
| Gaithersburg to Rhyl | 3,489.83 mi (5,616.33 km) |
| Gaithersburg to Rhymney | 3,527.38 mi (5,676.76 km) |
| Gaithersburg to Richmond | 3,655.65 mi (5,883.20 km) |
| Gaithersburg to Rickmansworth | 3,644.92 mi (5,865.93 km) |
| Gaithersburg to Ripley | 3,577.48 mi (5,757.40 km) |
| Gaithersburg to Ripon | 3,551.69 mi (5,715.89 km) |
| Gaithersburg to Risca | 3,538.25 mi (5,694.27 km) |
| Gaithersburg to Rochdale | 3,536.66 mi (5,691.71 km) |
| Gaithersburg to Rochester | 3,690.11 mi (5,938.65 km) |
| Gaithersburg to Rock Ferry | 3,507.65 mi (5,645.01 km) |
| Gaithersburg to Rogerstone | 3,540.13 mi (5,697.29 km) |
| Gaithersburg to Romford | 3,672.54 mi (5,910.37 km) |
| Gaithersburg to Romsey | 3,616.83 mi (5,820.72 km) |
