| Duffel to Robertsville (New Jersey) | 3,687.48 mi (5,934.42 km) |
| Duffel to Robinson (Texas) | 5,020.51 mi (8,079.73 km) |
| Duffel to Robstown (Texas) | 5,235.96 mi (8,426.46 km) |
| Duffel to Rochester (Michigan) | 3,928.70 mi (6,322.63 km) |
| Duffel to Rochester (Minnesota) | 4,210.35 mi (6,775.90 km) |
| Duffel to Rochester (New Hampshire) | 3,426.67 mi (5,514.70 km) |
| Duffel to Rochester (New York) | 3,695.04 mi (5,946.60 km) |
| Duffel to Rochester Hills (Michigan) | 3,931.10 mi (6,326.49 km) |
| Duffel to Rock Hill (South Carolina) | 4,210.42 mi (6,776.01 km) |
| Duffel to Rock Island (Illinois) | 4,265.48 mi (6,864.62 km) |
| Duffel to Rock Springs (Wyoming) | 4,897.14 mi (7,881.18 km) |
| Duffel to Rockford (Illinois) | 4,171.44 mi (6,713.29 km) |
| Duffel to Rockledge (Florida) | 4,524.50 mi (7,281.48 km) |
| Duffel to Rocklin (California) | 5,414.31 mi (8,713.49 km) |
| Duffel to Rockport (Texas) | 5,200.28 mi (8,369.03 km) |
