| Thornton to Cloverly (Maryland) | 3,538.48 mi (5,694.64 km) |
| Thornton to Clovis (California) | 5,165.41 mi (8,312.92 km) |
| Thornton to Clovis (New Mexico) | 4,758.54 mi (7,658.13 km) |
| Thornton to Clute (Texas) | 4,762.52 mi (7,664.53 km) |
| Thornton to Coachella (California) | 5,237.08 mi (8,428.27 km) |
| Thornton to Coalinga (California) | 5,224.51 mi (8,408.04 km) |
| Thornton to Coamo (Puerto Rico) | 4,182.03 mi (6,730.33 km) |
| Thornton to Coatesville (Pennsylvania) | 3,451.14 mi (5,554.08 km) |
| Thornton to Cockeysville (Maryland) | 3,506.41 mi (5,643.02 km) |
| Thornton to Cocoa (Florida) | 4,220.86 mi (6,792.82 km) |
| Thornton to Cocoa Beach (Florida) | 4,217.77 mi (6,787.85 km) |
| Thornton to Coconut Creek (Florida) | 4,306.70 mi (6,930.96 km) |
| Thornton to Coeur d'Alene (Idaho) | 4,462.45 mi (7,181.62 km) |
| Thornton to Cohoes (New York) | 3,242.17 mi (5,217.76 km) |
| Thornton to Cold Springs (Nevada) | 5,007.98 mi (8,059.56 km) |
