| Castlebar to Redon | 531.87 mi (855.96 km) |
| Castlebar to Reims | 653.46 mi (1,051.64 km) |
| Castlebar to Rennes | 516.56 mi (831.32 km) |
| Castlebar to Revel | 882.39 mi (1,420.06 km) |
| Castlebar to Reze | 571.65 mi (919.98 km) |
| Castlebar to Riedisheim | 838.39 mi (1,349.27 km) |
| Castlebar to Rillieux-la-Pape | 839.12 mi (1,350.43 km) |
| Castlebar to Riom | 777.91 mi (1,251.93 km) |
| Castlebar to Riorges | 799.79 mi (1,287.15 km) |
| Castlebar to Ris-Orangis | 620.08 mi (997.92 km) |
| Castlebar to Rive-de-Gier | 844.71 mi (1,359.44 km) |
| Castlebar to Rivesaltes | 945.96 mi (1,522.38 km) |
| Castlebar to Rixheim | 839.78 mi (1,351.50 km) |
| Castlebar to Roanne | 801.02 mi (1,289.13 km) |
| Castlebar to Roche-la-Moliere | 840.20 mi (1,352.17 km) |
