| Ostrow Mazowiecka to Cookeville (Tennessee) | 4,913.15 mi (7,906.95 km) |
| Ostrow Mazowiecka to Coolidge (Arizona) | 5,884.40 mi (9,470.03 km) |
| Ostrow Mazowiecka to Coon Rapids (Minnesota) | 4,660.63 mi (7,500.56 km) |
| Ostrow Mazowiecka to Cooper City (Florida) | 5,278.94 mi (8,495.63 km) |
| Ostrow Mazowiecka to Coos Bay (Oregon) | 5,493.10 mi (8,840.28 km) |
| Ostrow Mazowiecka to Copiague (New York) | 4,250.80 mi (6,841.01 km) |
| Ostrow Mazowiecka to Coppell (Texas) | 5,468.40 mi (8,800.53 km) |
| Ostrow Mazowiecka to Copperas Cove (Texas) | 5,605.02 mi (9,020.41 km) |
| Ostrow Mazowiecka to Coral Gables (Florida) | 5,297.18 mi (8,524.99 km) |
| Ostrow Mazowiecka to Coral Springs (Florida) | 5,265.63 mi (8,474.22 km) |
| Ostrow Mazowiecka to Coral Terrace (Florida) | 5,296.10 mi (8,523.25 km) |
| Ostrow Mazowiecka to Coralville (Iowa) | 4,803.35 mi (7,730.24 km) |
| Ostrow Mazowiecka to Coram (New York) | 4,226.36 mi (6,801.66 km) |
| Ostrow Mazowiecka to Corcoran (California) | 5,873.75 mi (9,452.88 km) |
| Ostrow Mazowiecka to Cordele (Georgia) | 5,082.41 mi (8,179.35 km) |
