| Didcot to Rockville (Maryland) | 3,613.97 mi (5,816.12 km) |
| Didcot to Rockville Centre (New York) | 3,400.62 mi (5,472.76 km) |
| Didcot to Rockwall (Texas) | 4,680.89 mi (7,533.16 km) |
| Didcot to Rocky Mount (North Carolina) | 3,782.90 mi (6,087.98 km) |
| Didcot to Rocky Point (New York) | 3,360.20 mi (5,407.72 km) |
| Didcot to Rocky River (Ohio) | 3,695.90 mi (5,947.98 km) |
| Didcot to Roessleville (New York) | 3,320.80 mi (5,344.31 km) |
| Didcot to Rogers (Arkansas) | 4,420.26 mi (7,113.72 km) |
| Didcot to Rogers (Minnesota) | 3,968.87 mi (6,387.28 km) |
| Didcot to Rohnert Park (California) | 5,291.12 mi (8,515.24 km) |
| Didcot to Rolla (Missouri) | 4,247.68 mi (6,835.98 km) |
| Didcot to Rolling Meadows (Illinois) | 3,907.95 mi (6,289.24 km) |
| Didcot to Roma (Texas) | 5,121.55 mi (8,242.33 km) |
| Didcot to Rome (Georgia) | 4,166.48 mi (6,705.30 km) |
| Didcot to Rome (New York) | 3,366.86 mi (5,418.44 km) |
