| Ionia to Ratingen | 4,068.92 mi (6,548.30 km) |
| Ionia to Ratzeburg | 4,120.56 mi (6,631.40 km) |
| Ionia to Raubling | 4,399.34 mi (7,080.06 km) |
| Ionia to Rauenberg | 4,213.22 mi (6,780.52 km) |
| Ionia to Raunheim | 4,175.42 mi (6,719.70 km) |
| Ionia to Ravensburg | 4,305.00 mi (6,928.23 km) |
| Ionia to Recke | 4,062.18 mi (6,537.44 km) |
| Ionia to Recklinghausen | 4,070.15 mi (6,550.27 km) |
| Ionia to Regen | 4,389.73 mi (7,064.59 km) |
| Ionia to Regensburg | 4,349.06 mi (6,999.14 km) |
| Ionia to Regenstauf | 4,346.44 mi (6,994.92 km) |
| Ionia to Rehau | 4,297.60 mi (6,916.32 km) |
| Ionia to Rehburg-Loccum | 4,112.61 mi (6,618.61 km) |
| Ionia to Rehlingen-Siersburg | 4,132.79 mi (6,651.09 km) |
| Ionia to Reichelsheim | 4,201.35 mi (6,761.41 km) |
