| London Colney to Romeoville (Illinois) | 3,963.37 mi (6,378.43 km) |
| London Colney to Romulus (Michigan) | 3,754.61 mi (6,042.47 km) |
| London Colney to Ronkonkoma (New York) | 3,409.59 mi (5,487.20 km) |
| London Colney to Roosevelt (New York) | 3,433.68 mi (5,525.98 km) |
| London Colney to Rosamond (California) | 5,377.40 mi (8,654.10 km) |
| London Colney to Rosaryville (Maryland) | 3,650.62 mi (5,875.11 km) |
| London Colney to Roscoe (Illinois) | 3,960.50 mi (6,373.81 km) |
| London Colney to Rose Hill (Virginia) | 3,661.19 mi (5,892.12 km) |
| London Colney to Roseburg (Oregon) | 5,047.57 mi (8,123.28 km) |
| London Colney to Rosedale (California) | 5,378.60 mi (8,656.02 km) |
| London Colney to Rosedale (Maryland) | 3,612.47 mi (5,813.72 km) |
| London Colney to Roselle (Illinois) | 3,946.53 mi (6,351.32 km) |
| London Colney to Roselle (New Jersey) | 3,462.39 mi (5,572.17 km) |
| London Colney to Roselle Park (New Jersey) | 3,462.11 mi (5,571.73 km) |
| London Colney to Rosemead (California) | 5,418.79 mi (8,720.70 km) |
