| Port Huron to Rheinbach | 3,997.56 mi (6,433.45 km) |
| Port Huron to Rheinberg | 3,952.97 mi (6,361.69 km) |
| Port Huron to Rheine | 3,958.72 mi (6,370.94 km) |
| Port Huron to Rheinfelden (Baden) | 4,140.30 mi (6,663.17 km) |
| Port Huron to Ribnitz-Damgarten | 4,068.56 mi (6,547.72 km) |
| Port Huron to Richterich | 3,957.88 mi (6,369.58 km) |
| Port Huron to Riedlingen | 4,183.85 mi (6,733.26 km) |
| Port Huron to Riegelsberg | 4,044.17 mi (6,508.47 km) |
| Port Huron to Rielasingen-Worblingen | 4,175.00 mi (6,719.01 km) |
| Port Huron to Riesa | 4,207.25 mi (6,770.91 km) |
| Port Huron to Rietberg | 4,012.23 mi (6,457.05 km) |
| Port Huron to Rinteln | 4,022.25 mi (6,473.18 km) |
| Port Huron to Ritterhude | 3,975.87 mi (6,398.54 km) |
| Port Huron to Rodenbach | 4,093.43 mi (6,587.74 km) |
| Port Huron to Rodental | 4,164.57 mi (6,702.23 km) |
