| Sintra to Corinth (Mississippi) | 4,238.96 mi (6,821.94 km) |
| Sintra to Corinth (Texas) | 4,722.26 mi (7,599.75 km) |
| Sintra to Cornelius (North Carolina) | 3,841.03 mi (6,181.53 km) |
| Sintra to Cornelius (Oregon) | 5,308.21 mi (8,542.75 km) |
| Sintra to Corning (New York) | 3,468.91 mi (5,582.68 km) |
| Sintra to Corona (California) | 5,633.34 mi (9,065.98 km) |
| Sintra to Coronado (California) | 5,670.62 mi (9,125.99 km) |
| Sintra to Corpus Christi (Texas) | 4,946.75 mi (7,961.02 km) |
| Sintra to Corsicana (Texas) | 4,733.04 mi (7,617.09 km) |
| Sintra to Cortland (New York) | 3,416.13 mi (5,497.74 km) |
| Sintra to Corvallis (Oregon) | 5,361.03 mi (8,627.75 km) |
| Sintra to Coshocton (Ohio) | 3,748.60 mi (6,032.80 km) |
| Sintra to Costa Mesa (California) | 5,657.25 mi (9,104.46 km) |
| Sintra to Coto de Caza (California) | 5,646.42 mi (9,087.04 km) |
| Sintra to Cottage Grove (Minnesota) | 4,127.96 mi (6,643.31 km) |
