| Ostrow Mazowiecka to Castle Rock (Colorado) | 5,317.24 mi (8,557.27 km) |
| Ostrow Mazowiecka to Castro Valley (California) | 5,820.21 mi (9,366.73 km) |
| Ostrow Mazowiecka to Catalina Foothills (Arizona) | 5,907.00 mi (9,506.39 km) |
| Ostrow Mazowiecka to Cataño (Puerto Rico) | 5,129.95 mi (8,255.86 km) |
| Ostrow Mazowiecka to Cathedral City (California) | 5,948.25 mi (9,572.78 km) |
| Ostrow Mazowiecka to Catonsville (Maryland) | 4,442.14 mi (7,148.94 km) |
| Ostrow Mazowiecka to Cave Spring (Virginia) | 4,664.44 mi (7,506.70 km) |
| Ostrow Mazowiecka to Cayce (South Carolina) | 4,876.77 mi (7,848.40 km) |
| Ostrow Mazowiecka to Cayey (Puerto Rico) | 5,148.08 mi (8,285.04 km) |
| Ostrow Mazowiecka to Cedar City (Utah) | 5,627.91 mi (9,057.25 km) |
| Ostrow Mazowiecka to Cedar Falls (Iowa) | 4,783.53 mi (7,698.35 km) |
| Ostrow Mazowiecka to Cedar Hill (Texas) | 5,489.71 mi (8,834.83 km) |
| Ostrow Mazowiecka to Cedar Lake (Indiana) | 4,691.61 mi (7,550.42 km) |
| Ostrow Mazowiecka to Cedar Mill (Oregon) | 5,328.79 mi (8,575.86 km) |
| Ostrow Mazowiecka to Cedar Park (Texas) | 5,637.69 mi (9,072.99 km) |
