| Lake Oswego to Cividale del Friuli | 5,573.32 mi (8,969.39 km) |
| Lake Oswego to Civita Castellana | 5,776.46 mi (9,296.32 km) |
| Lake Oswego to Civitanova Marche | 5,749.18 mi (9,252.41 km) |
| Lake Oswego to Civitavecchia | 5,772.54 mi (9,290.00 km) |
| Lake Oswego to Civitella in Val di Chiana | 5,691.88 mi (9,160.19 km) |
| Lake Oswego to Clusone | 5,501.08 mi (8,853.14 km) |
| Lake Oswego to Coccaglio | 5,520.62 mi (8,884.59 km) |
| Lake Oswego to Codigoro | 5,617.40 mi (9,040.33 km) |
| Lake Oswego to Codogno | 5,537.37 mi (8,911.54 km) |
| Lake Oswego to Codroipo | 5,570.79 mi (8,965.32 km) |
| Lake Oswego to Cogoleto | 5,554.97 mi (8,939.85 km) |
| Lake Oswego to Colle di Val d'Elsa | 5,677.98 mi (9,137.82 km) |
| Lake Oswego to Colle Salvetti | 5,649.38 mi (9,091.79 km) |
| Lake Oswego to Collecchio | 5,574.60 mi (8,971.46 km) |
| Lake Oswego to Colleferro | 5,825.67 mi (9,375.52 km) |
