| Ostrow Mazowiecka to Carson (California) | 5,988.82 mi (9,638.08 km) |
| Ostrow Mazowiecka to Carson City (Nevada) | 5,681.44 mi (9,143.40 km) |
| Ostrow Mazowiecka to Carteret (New Jersey) | 4,285.08 mi (6,896.16 km) |
| Ostrow Mazowiecka to Cartersville (Georgia) | 4,997.48 mi (8,042.67 km) |
| Ostrow Mazowiecka to Carthage (Missouri) | 5,143.91 mi (8,278.32 km) |
| Ostrow Mazowiecka to Cary (Illinois) | 4,671.33 mi (7,517.77 km) |
| Ostrow Mazowiecka to Cary (North Carolina) | 4,698.79 mi (7,561.97 km) |
| Ostrow Mazowiecka to Casa de Oro-Mount Helix (California) | 6,027.80 mi (9,700.80 km) |
| Ostrow Mazowiecka to Casa Grande (Arizona) | 5,892.27 mi (9,482.69 km) |
| Ostrow Mazowiecka to Casas Adobes (Arizona) | 5,907.97 mi (9,507.96 km) |
| Ostrow Mazowiecka to Cascades (Virginia) | 4,476.31 mi (7,203.92 km) |
| Ostrow Mazowiecka to Casper (Wyoming) | 5,146.99 mi (8,283.29 km) |
| Ostrow Mazowiecka to Casselberry (Florida) | 5,174.22 mi (8,327.11 km) |
| Ostrow Mazowiecka to Castaic (California) | 5,956.06 mi (9,585.36 km) |
| Ostrow Mazowiecka to Castle Pines (Colorado) | 5,312.53 mi (8,549.69 km) |
