| Sintra to Cloverly (Maryland) | 3,542.80 mi (5,701.58 km) |
| Sintra to Clovis (California) | 5,585.41 mi (8,988.84 km) |
| Sintra to Clovis (New Mexico) | 4,963.54 mi (7,988.05 km) |
| Sintra to Clute (Texas) | 4,796.73 mi (7,719.59 km) |
| Sintra to Coachella (California) | 5,579.68 mi (8,979.64 km) |
| Sintra to Coalinga (California) | 5,643.67 mi (9,082.61 km) |
| Sintra to Coamo (Puerto Rico) | 3,679.83 mi (5,922.11 km) |
| Sintra to Coatesville (Pennsylvania) | 3,461.81 mi (5,571.25 km) |
| Sintra to Cockeysville (Maryland) | 3,514.67 mi (5,656.32 km) |
| Sintra to Cocoa (Florida) | 4,068.43 mi (6,547.50 km) |
| Sintra to Cocoa Beach (Florida) | 4,062.80 mi (6,538.45 km) |
| Sintra to Coconut Creek (Florida) | 4,112.20 mi (6,617.94 km) |
| Sintra to Coeur d'Alene (Idaho) | 4,984.80 mi (8,022.27 km) |
| Sintra to Cohoes (New York) | 3,293.51 mi (5,300.40 km) |
| Sintra to Cold Springs (Nevada) | 5,464.48 mi (8,794.22 km) |
