| Opmeer to Caguas (Puerto Rico) | 4,430.79 mi (7,130.67 km) |
| Opmeer to Cahokia (Illinois) | 4,354.89 mi (7,008.51 km) |
| Opmeer to Calabasas (California) | 5,547.34 mi (8,927.59 km) |
| Opmeer to Caldwell (Idaho) | 4,932.28 mi (7,937.73 km) |
| Opmeer to Caledonia (Wisconsin) | 4,060.31 mi (6,534.44 km) |
| Opmeer to Calera (Alabama) | 4,503.83 mi (7,248.21 km) |
| Opmeer to Calexico (California) | 5,537.56 mi (8,911.84 km) |
| Opmeer to Calhoun (Georgia) | 4,364.25 mi (7,023.58 km) |
| Opmeer to California (Maryland) | 3,847.51 mi (6,191.97 km) |
| Opmeer to California City (California) | 5,463.59 mi (8,792.80 km) |
| Opmeer to Callaway (Florida) | 4,612.07 mi (7,422.41 km) |
| Opmeer to Calumet City (Illinois) | 4,106.59 mi (6,608.92 km) |
| Opmeer to Calverton (Maryland) | 3,829.22 mi (6,162.53 km) |
| Opmeer to Camano (Washington) | 4,813.95 mi (7,747.30 km) |
| Opmeer to Camarillo (California) | 5,552.87 mi (8,936.48 km) |
