| Didcot to Romeoville (Illinois) | 3,931.32 mi (6,326.85 km) |
| Didcot to Romulus (Michigan) | 3,721.56 mi (5,989.27 km) |
| Didcot to Ronkonkoma (New York) | 3,373.57 mi (5,429.23 km) |
| Didcot to Roosevelt (New York) | 3,397.72 mi (5,468.10 km) |
| Didcot to Rosamond (California) | 5,352.87 mi (8,614.62 km) |
| Didcot to Rosaryville (Maryland) | 3,614.71 mi (5,817.32 km) |
| Didcot to Roscoe (Illinois) | 3,929.02 mi (6,323.14 km) |
| Didcot to Rose Hill (Virginia) | 3,625.35 mi (5,834.44 km) |
| Didcot to Roseburg (Oregon) | 5,028.02 mi (8,091.82 km) |
| Didcot to Rosedale (California) | 5,354.64 mi (8,617.46 km) |
| Didcot to Rosedale (Maryland) | 3,576.68 mi (5,756.12 km) |
| Didcot to Roselle (Illinois) | 3,914.61 mi (6,299.96 km) |
| Didcot to Roselle (New Jersey) | 3,426.56 mi (5,514.52 km) |
| Didcot to Roselle Park (New Jersey) | 3,426.29 mi (5,514.08 km) |
| Didcot to Rosemead (California) | 5,393.94 mi (8,680.71 km) |
