| Sintra to Caño Martin Peña (Puerto Rico) | 3,648.91 mi (5,872.36 km) |
| Sintra to Cañon City (Colorado) | 4,897.32 mi (7,881.48 km) |
| Sintra to Canóvanas (Puerto Rico) | 3,643.34 mi (5,863.39 km) |
| Sintra to Canton (Georgia) | 4,061.63 mi (6,536.56 km) |
| Sintra to Canton (Illinois) | 4,129.00 mi (6,644.98 km) |
| Sintra to Canton (Mississippi) | 4,395.76 mi (7,074.29 km) |
| Sintra to Canton (Ohio) | 3,710.46 mi (5,971.41 km) |
| Sintra to Canyon (Texas) | 4,882.32 mi (7,857.34 km) |
| Sintra to Canyon Lake (California) | 5,628.23 mi (9,057.75 km) |
| Sintra to Canyon Lake (Texas) | 4,906.26 mi (7,895.86 km) |
| Sintra to Cape Coral (Florida) | 4,194.71 mi (6,750.74 km) |
| Sintra to Cape Girardeau (Missouri) | 4,211.05 mi (6,777.03 km) |
| Sintra to Carbondale (Illinois) | 4,181.35 mi (6,729.23 km) |
| Sintra to Carlisle (Pennsylvania) | 3,524.33 mi (5,671.86 km) |
| Sintra to Carlsbad (California) | 5,654.93 mi (9,100.74 km) |
