| San Mateo to Rome (New York) | 2,462.35 mi (3,962.76 km) |
| San Mateo to Romeoville (Illinois) | 1,831.02 mi (2,946.75 km) |
| San Mateo to Romulus (Michigan) | 2,071.49 mi (3,333.75 km) |
| San Mateo to Ronkonkoma (New York) | 2,609.48 mi (4,199.55 km) |
| San Mateo to Roosevelt (New York) | 2,587.64 mi (4,164.41 km) |
| San Mateo to Rosamond (California) | 294.24 mi (473.53 km) |
| San Mateo to Rosaryville (Maryland) | 2,446.73 mi (3,937.64 km) |
| San Mateo to Roscoe (Illinois) | 1,782.98 mi (2,869.44 km) |
| San Mateo to Rose Hill (Virginia) | 2,431.61 mi (3,913.31 km) |
| San Mateo to Roseburg (Oregon) | 395.61 mi (636.68 km) |
| San Mateo to Rosedale (California) | 228.31 mi (367.42 km) |
| San Mateo to Rosedale (Maryland) | 2,455.14 mi (3,951.17 km) |
| San Mateo to Roselle (Illinois) | 1,830.79 mi (2,946.37 km) |
| San Mateo to Roselle (New Jersey) | 2,553.27 mi (4,109.09 km) |
| San Mateo to Roselle Park (New Jersey) | 2,552.75 mi (4,108.26 km) |
