| Sintra to Chantilly (Virginia) | 3,570.74 mi (5,746.54 km) |
| Sintra to Chaparral (New Mexico) | 5,210.97 mi (8,386.24 km) |
| Sintra to Chapel Hill (North Carolina) | 3,734.33 mi (6,009.83 km) |
| Sintra to Charleston (Illinois) | 4,074.99 mi (6,558.07 km) |
| Sintra to Charleston (South Carolina) | 3,878.01 mi (6,241.06 km) |
| Sintra to Charleston (West Virginia) | 3,792.47 mi (6,103.39 km) |
| Sintra to Charlotte (North Carolina) | 3,846.58 mi (6,190.48 km) |
| Sintra to Charlottesville (Virginia) | 3,645.67 mi (5,867.14 km) |
| Sintra to Chaska (Minnesota) | 4,157.86 mi (6,691.43 km) |
| Sintra to Chatham (Illinois) | 4,140.84 mi (6,664.04 km) |
| Sintra to Chattanooga (Tennessee) | 4,072.88 mi (6,554.66 km) |
| Sintra to Cheat Lake (West Virginia) | 3,668.26 mi (5,903.49 km) |
| Sintra to Chelsea (Alabama) | 4,199.96 mi (6,759.18 km) |
| Sintra to Chelsea (Massachusetts) | 3,171.81 mi (5,104.54 km) |
| Sintra to Cheney (Washington) | 5,022.57 mi (8,083.04 km) |
