| Didcot to Ridgeland (Mississippi) | 4,457.75 mi (7,174.05 km) |
| Didcot to Ridgewood (New Jersey) | 3,406.35 mi (5,481.98 km) |
| Didcot to Rifle (Colorado) | 4,749.39 mi (7,643.40 km) |
| Didcot to Rincon (Georgia) | 4,099.93 mi (6,598.20 km) |
| Didcot to Ringwood (New Jersey) | 3,407.62 mi (5,484.03 km) |
| Didcot to Río Grande (Puerto Rico) | 4,145.84 mi (6,672.08 km) |
| Didcot to Rio Grande City (Texas) | 5,116.13 mi (8,233.62 km) |
| Didcot to Rio Linda (California) | 5,234.26 mi (8,423.73 km) |
| Didcot to Rio Rancho (New Mexico) | 4,938.75 mi (7,948.14 km) |
| Didcot to Rio Rico (Arizona) | 5,297.49 mi (8,525.48 km) |
| Didcot to Ripon (California) | 5,279.33 mi (8,496.26 km) |
| Didcot to River Edge (New Jersey) | 3,405.70 mi (5,480.94 km) |
| Didcot to River Falls (Wisconsin) | 3,949.71 mi (6,356.44 km) |
| Didcot to River Forest (Illinois) | 3,908.41 mi (6,289.97 km) |
| Didcot to River Grove (Illinois) | 3,907.76 mi (6,288.93 km) |
