| Sintra to Castle Rock (Colorado) | 4,844.44 mi (7,796.38 km) |
| Sintra to Castro Valley (California) | 5,640.05 mi (9,076.78 km) |
| Sintra to Catalina Foothills (Arizona) | 5,406.77 mi (8,701.36 km) |
| Sintra to Cataño (Puerto Rico) | 3,653.65 mi (5,879.98 km) |
| Sintra to Cathedral City (California) | 5,587.02 mi (8,991.44 km) |
| Sintra to Catonsville (Maryland) | 3,525.90 mi (5,674.38 km) |
| Sintra to Cave Spring (Virginia) | 3,744.69 mi (6,026.49 km) |
| Sintra to Cayce (South Carolina) | 3,896.90 mi (6,271.45 km) |
| Sintra to Cayey (Puerto Rico) | 3,667.53 mi (5,902.32 km) |
| Sintra to Cedar City (Utah) | 5,271.64 mi (8,483.88 km) |
| Sintra to Cedar Falls (Iowa) | 4,178.29 mi (6,724.31 km) |
| Sintra to Cedar Hill (Texas) | 4,738.22 mi (7,625.42 km) |
| Sintra to Cedar Lake (Indiana) | 3,982.62 mi (6,409.41 km) |
| Sintra to Cedar Mill (Oregon) | 5,298.53 mi (8,527.17 km) |
| Sintra to Cedar Park (Texas) | 4,859.77 mi (7,821.04 km) |
