| Quincy to Cloverleaf (Texas) | 1,592.27 mi (2,562.52 km) |
| Quincy to Cloverly (Maryland) | 381.17 mi (613.43 km) |
| Quincy to Clovis (California) | 2,584.48 mi (4,159.32 km) |
| Quincy to Clovis (New Mexico) | 1,812.83 mi (2,917.46 km) |
| Quincy to Clute (Texas) | 1,636.47 mi (2,633.64 km) |
| Quincy to Coachella (California) | 2,497.39 mi (4,019.17 km) |
| Quincy to Coalinga (California) | 2,636.43 mi (4,242.92 km) |
| Quincy to Coamo (Puerto Rico) | 1,692.57 mi (2,723.92 km) |
| Quincy to Coatesville (Pennsylvania) | 294.83 mi (474.48 km) |
| Quincy to Cockeysville (Maryland) | 350.00 mi (563.27 km) |
| Quincy to Cocoa (Florida) | 1,102.87 mi (1,774.90 km) |
| Quincy to Cocoa Beach (Florida) | 1,102.05 mi (1,773.58 km) |
| Quincy to Coconut Creek (Florida) | 1,219.44 mi (1,962.50 km) |
| Quincy to Coeur d'Alene (Idaho) | 2,235.29 mi (3,597.36 km) |
| Quincy to Cohoes (New York) | 141.63 mi (227.93 km) |
