| Glen Carbon to Rancho Cordova (California) | 1,678.72 mi (2,701.65 km) |
| Glen Carbon to Rancho Cucamonga (California) | 1,560.03 mi (2,510.62 km) |
| Glen Carbon to Rancho Mirage (California) | 1,507.47 mi (2,426.04 km) |
| Glen Carbon to Rancho Palos Verdes (California) | 1,611.70 mi (2,593.78 km) |
| Glen Carbon to Rancho San Diego (California) | 1,559.74 mi (2,510.16 km) |
| Glen Carbon to Rancho Santa Margarita (California) | 1,573.64 mi (2,532.52 km) |
| Glen Carbon to Randallstown (Maryland) | 707.69 mi (1,138.91 km) |
| Glen Carbon to Rantoul (Illinois) | 144.49 mi (232.53 km) |
| Glen Carbon to Rapid City (South Dakota) | 776.70 mi (1,249.99 km) |
| Glen Carbon to Ravenna (Ohio) | 491.48 mi (790.96 km) |
| Glen Carbon to Raymondville (Texas) | 961.28 mi (1,547.03 km) |
| Glen Carbon to Raymore (Missouri) | 241.09 mi (387.99 km) |
| Glen Carbon to Raytown (Missouri) | 241.61 mi (388.83 km) |
| Glen Carbon to Reading (Ohio) | 299.68 mi (482.28 km) |
| Glen Carbon to Reading (Pennsylvania) | 755.94 mi (1,216.56 km) |
