| Sintra to Caguas (Puerto Rico) | 3,656.21 mi (5,884.10 km) |
| Sintra to Cahokia (Illinois) | 4,199.60 mi (6,758.60 km) |
| Sintra to Calabasas (California) | 5,667.80 mi (9,121.44 km) |
| Sintra to Caldwell (Idaho) | 5,156.50 mi (8,298.59 km) |
| Sintra to Caledonia (Wisconsin) | 3,960.89 mi (6,374.44 km) |
| Sintra to Calera (Alabama) | 4,212.57 mi (6,779.48 km) |
| Sintra to Calexico (California) | 5,596.68 mi (9,006.99 km) |
| Sintra to Calhoun (Georgia) | 4,076.17 mi (6,559.96 km) |
| Sintra to California (Maryland) | 3,539.32 mi (5,695.98 km) |
| Sintra to California City (California) | 5,587.05 mi (8,991.49 km) |
| Sintra to Callaway (Florida) | 4,255.77 mi (6,849.00 km) |
| Sintra to Calumet City (Illinois) | 3,980.60 mi (6,406.15 km) |
| Sintra to Calverton (Maryland) | 3,541.57 mi (5,699.61 km) |
| Sintra to Camano (Washington) | 5,163.62 mi (8,310.04 km) |
| Sintra to Camarillo (California) | 5,679.24 mi (9,139.85 km) |
