| Alpena to Ratingen | 3,911.43 mi (6,294.83 km) |
| Alpena to Ratzeburg | 3,959.87 mi (6,372.80 km) |
| Alpena to Raubling | 4,242.93 mi (6,828.33 km) |
| Alpena to Rauenberg | 4,056.90 mi (6,528.95 km) |
| Alpena to Raunheim | 4,018.51 mi (6,467.17 km) |
| Alpena to Ravensburg | 4,149.70 mi (6,678.30 km) |
| Alpena to Recke | 3,903.43 mi (6,281.97 km) |
| Alpena to Recklinghausen | 3,912.28 mi (6,296.20 km) |
| Alpena to Regen | 4,231.89 mi (6,810.57 km) |
| Alpena to Regensburg | 4,191.59 mi (6,745.72 km) |
| Alpena to Regenstauf | 4,188.87 mi (6,741.33 km) |
| Alpena to Rehau | 4,139.14 mi (6,661.30 km) |
| Alpena to Rehburg-Loccum | 3,953.33 mi (6,362.26 km) |
| Alpena to Rehlingen-Siersburg | 3,977.21 mi (6,400.71 km) |
| Alpena to Reichelsheim | 4,044.56 mi (6,509.08 km) |
