| Duffel to Rockville (Maryland) | 3,859.42 mi (6,211.13 km) |
| Duffel to Rockville Centre (New York) | 3,646.64 mi (5,868.70 km) |
| Duffel to Rockwall (Texas) | 4,917.44 mi (7,913.86 km) |
| Duffel to Rocky Mount (North Carolina) | 4,030.30 mi (6,486.13 km) |
| Duffel to Rocky Point (New York) | 3,606.35 mi (5,803.87 km) |
| Duffel to Rocky River (Ohio) | 3,935.79 mi (6,334.05 km) |
| Duffel to Roessleville (New York) | 3,564.80 mi (5,736.99 km) |
| Duffel to Rogers (Arkansas) | 4,655.39 mi (7,492.13 km) |
| Duffel to Rogers (Minnesota) | 4,192.22 mi (6,746.73 km) |
| Duffel to Rohnert Park (California) | 5,481.77 mi (8,822.06 km) |
| Duffel to Rolla (Missouri) | 4,483.24 mi (7,215.08 km) |
| Duffel to Rolling Meadows (Illinois) | 4,141.81 mi (6,665.61 km) |
| Duffel to Roma (Texas) | 5,361.66 mi (8,628.76 km) |
| Duffel to Rome (Georgia) | 4,410.95 mi (7,098.74 km) |
| Duffel to Rome (New York) | 3,609.22 mi (5,808.48 km) |
