| Tonawanda to Collegno | 4,076.96 mi (6,561.24 km) |
| Tonawanda to Cologno al Serio | 4,146.04 mi (6,672.41 km) |
| Tonawanda to Cologno Monzese | 4,130.82 mi (6,647.92 km) |
| Tonawanda to Colorno | 4,198.29 mi (6,756.49 km) |
| Tonawanda to Comacchio | 4,280.70 mi (6,889.13 km) |
| Tonawanda to Comiso | 4,698.52 mi (7,561.54 km) |
| Tonawanda to Como | 4,112.61 mi (6,618.61 km) |
| Tonawanda to Concordia Sagittaria | 4,266.39 mi (6,866.09 km) |
| Tonawanda to Concorezzo | 4,130.93 mi (6,648.09 km) |
| Tonawanda to Conegliano | 4,239.66 mi (6,823.07 km) |
| Tonawanda to Conselice | 4,273.52 mi (6,877.57 km) |
| Tonawanda to Conselve | 4,247.32 mi (6,835.40 km) |
| Tonawanda to Conversano | 4,634.41 mi (7,458.36 km) |
| Tonawanda to Copertino | 4,702.78 mi (7,568.39 km) |
| Tonawanda to Copparo | 4,258.75 mi (6,853.80 km) |
