| Lake Oswego to Collegno | 5,486.50 mi (8,829.67 km) |
| Lake Oswego to Cologno al Serio | 5,512.38 mi (8,871.31 km) |
| Lake Oswego to Cologno Monzese | 5,504.80 mi (8,859.12 km) |
| Lake Oswego to Colorno | 5,568.04 mi (8,960.89 km) |
| Lake Oswego to Comacchio | 5,627.00 mi (9,055.79 km) |
| Lake Oswego to Comiso | 6,155.79 mi (9,906.79 km) |
| Lake Oswego to Como | 5,483.38 mi (8,824.65 km) |
| Lake Oswego to Concordia Sagittaria | 5,579.43 mi (8,979.23 km) |
| Lake Oswego to Concorezzo | 5,502.70 mi (8,855.74 km) |
| Lake Oswego to Conegliano | 5,558.93 mi (8,946.23 km) |
| Lake Oswego to Conselice | 5,629.25 mi (9,059.41 km) |
| Lake Oswego to Conselve | 5,587.38 mi (8,992.02 km) |
| Lake Oswego to Conversano | 5,972.97 mi (9,612.57 km) |
| Lake Oswego to Copertino | 6,038.17 mi (9,717.49 km) |
| Lake Oswego to Copparo | 5,606.41 mi (9,022.65 km) |
