| Thornton to Ridgeland (Mississippi) | 4,381.98 mi (7,052.11 km) |
| Thornton to Ridgewood (New Jersey) | 3,338.31 mi (5,372.49 km) |
| Thornton to Rifle (Colorado) | 4,638.29 mi (7,464.61 km) |
| Thornton to Rincon (Georgia) | 4,039.30 mi (6,500.63 km) |
| Thornton to Ringwood (New Jersey) | 3,339.03 mi (5,373.65 km) |
| Thornton to Río Grande (Puerto Rico) | 4,144.40 mi (6,669.77 km) |
| Thornton to Rio Grande City (Texas) | 5,035.90 mi (8,104.50 km) |
| Thornton to Rio Linda (California) | 5,108.78 mi (8,221.79 km) |
| Thornton to Rio Rancho (New Mexico) | 4,834.36 mi (7,780.16 km) |
| Thornton to Rio Rico (Arizona) | 5,191.96 mi (8,355.66 km) |
| Thornton to Ripon (California) | 5,155.00 mi (8,296.17 km) |
| Thornton to River Edge (New Jersey) | 3,337.91 mi (5,371.85 km) |
| Thornton to River Falls (Wisconsin) | 3,848.68 mi (6,193.86 km) |
| Thornton to River Forest (Illinois) | 3,818.82 mi (6,145.79 km) |
| Thornton to River Grove (Illinois) | 3,818.09 mi (6,144.62 km) |
