| Sintra to Centralia (Illinois) | 4,150.57 mi (6,679.70 km) |
| Sintra to Centralia (Washington) | 5,248.94 mi (8,447.35 km) |
| Sintra to Centreville (Virginia) | 3,571.70 mi (5,748.10 km) |
| Sintra to Ceres (California) | 5,601.45 mi (9,014.66 km) |
| Sintra to Cerritos (California) | 5,654.65 mi (9,100.27 km) |
| Sintra to Chalco (Nebraska) | 4,388.90 mi (7,063.26 km) |
| Sintra to Chalmette (Louisiana) | 4,488.00 mi (7,222.74 km) |
| Sintra to Chambersburg (Pennsylvania) | 3,553.45 mi (5,718.72 km) |
| Sintra to Chamblee (Georgia) | 4,064.00 mi (6,540.37 km) |
| Sintra to Champaign (Illinois) | 4,059.96 mi (6,533.87 km) |
| Sintra to Champlin (Minnesota) | 4,137.39 mi (6,658.48 km) |
| Sintra to Chandler (Arizona) | 5,408.13 mi (8,703.55 km) |
| Sintra to Chanhassen (Minnesota) | 4,154.62 mi (6,686.22 km) |
| Sintra to Channahon (Illinois) | 4,019.44 mi (6,468.66 km) |
| Sintra to Channelview (Texas) | 4,753.20 mi (7,649.54 km) |
