| San Mateo to Ramsey (New Jersey) | 2,553.78 mi (4,109.91 km) |
| San Mateo to Rancho Cordova (California) | 91.12 mi (146.64 km) |
| San Mateo to Rancho Cucamonga (California) | 355.90 mi (572.76 km) |
| San Mateo to Rancho Mirage (California) | 421.36 mi (678.11 km) |
| San Mateo to Rancho Palos Verdes (California) | 343.38 mi (552.62 km) |
| San Mateo to Rancho San Diego (California) | 449.62 mi (723.59 km) |
| San Mateo to Rancho Santa Margarita (California) | 378.71 mi (609.47 km) |
| San Mateo to Randallstown (Maryland) | 2,439.12 mi (3,925.38 km) |
| San Mateo to Rantoul (Illinois) | 1,834.36 mi (2,952.12 km) |
| San Mateo to Rapid City (South Dakota) | 1,091.89 mi (1,757.23 km) |
| San Mateo to Ravenna (Ohio) | 2,187.83 mi (3,520.97 km) |
| San Mateo to Raymondville (Texas) | 1,621.36 mi (2,609.32 km) |
| San Mateo to Raymore (Missouri) | 1,509.48 mi (2,429.27 km) |
| San Mateo to Raytown (Missouri) | 1,507.95 mi (2,426.81 km) |
| San Mateo to Reading (Ohio) | 2,039.69 mi (3,282.56 km) |
