| Duffel to Ridgeland (Mississippi) | 4,700.23 mi (7,564.28 km) |
| Duffel to Ridgewood (New Jersey) | 3,651.84 mi (5,877.06 km) |
| Duffel to Rifle (Colorado) | 4,963.49 mi (7,987.96 km) |
| Duffel to Rincon (Georgia) | 4,347.88 mi (6,997.24 km) |
| Duffel to Ringwood (New Jersey) | 3,652.91 mi (5,878.78 km) |
| Duffel to Río Grande (Puerto Rico) | 4,389.53 mi (7,064.26 km) |
| Duffel to Rio Grande City (Texas) | 5,356.44 mi (8,620.36 km) |
| Duffel to Rio Linda (California) | 5,426.79 mi (8,733.58 km) |
| Duffel to Rio Rancho (New Mexico) | 5,160.40 mi (8,304.86 km) |
| Duffel to Rio Rico (Arizona) | 5,517.93 mi (8,880.25 km) |
| Duffel to Ripon (California) | 5,473.89 mi (8,809.38 km) |
| Duffel to River Edge (New Jersey) | 3,651.28 mi (5,876.16 km) |
| Duffel to River Falls (Wisconsin) | 4,174.67 mi (6,718.48 km) |
| Duffel to River Forest (Illinois) | 4,142.71 mi (6,667.04 km) |
| Duffel to River Grove (Illinois) | 4,142.00 mi (6,665.91 km) |
