| London Colney to Rockville (Maryland) | 3,649.70 mi (5,873.62 km) |
| London Colney to Rockville Centre (New York) | 3,436.58 mi (5,530.63 km) |
| London Colney to Rockwall (Texas) | 4,713.63 mi (7,585.85 km) |
| London Colney to Rocky Mount (North Carolina) | 3,819.47 mi (6,146.84 km) |
| London Colney to Rocky Point (New York) | 3,396.21 mi (5,465.67 km) |
| London Colney to Rocky River (Ohio) | 3,729.64 mi (6,002.27 km) |
| London Colney to Roessleville (New York) | 3,355.95 mi (5,400.88 km) |
| London Colney to Rogers (Arkansas) | 4,452.56 mi (7,165.70 km) |
| London Colney to Rogers (Minnesota) | 3,997.89 mi (6,433.98 km) |
| London Colney to Rohnert Park (California) | 5,312.65 mi (8,549.89 km) |
| London Colney to Rolla (Missouri) | 4,280.10 mi (6,888.15 km) |
| London Colney to Rolling Meadows (Illinois) | 3,939.84 mi (6,340.56 km) |
| London Colney to Roma (Texas) | 5,155.42 mi (8,296.84 km) |
| London Colney to Rome (Georgia) | 4,201.84 mi (6,762.21 km) |
| London Colney to Rome (New York) | 3,401.42 mi (5,474.06 km) |
