| Lake Oswego to Cernavoda | 5,981.76 mi (9,626.71 km) |
| Lake Oswego to Chitila | 5,934.84 mi (9,551.20 km) |
| Lake Oswego to Cisnadie | 5,824.17 mi (9,373.09 km) |
| Lake Oswego to Cluj-Napoca | 5,746.54 mi (9,248.16 km) |
| Lake Oswego to Codlea | 5,848.83 mi (9,412.78 km) |
| Lake Oswego to Comanesti | 5,819.43 mi (9,365.47 km) |
| Lake Oswego to Comarnic | 5,880.87 mi (9,464.35 km) |
| Lake Oswego to Constanta | 6,003.00 mi (9,660.89 km) |
| Lake Oswego to Corabia | 5,954.55 mi (9,582.92 km) |
| Lake Oswego to Costesti | 5,904.33 mi (9,502.11 km) |
| Lake Oswego to Covasna | 5,852.20 mi (9,418.21 km) |
| Lake Oswego to Craiova | 5,905.73 mi (9,504.36 km) |
| Lake Oswego to Cristuru Secuiesc | 5,803.38 mi (9,339.64 km) |
| Lake Oswego to Cugir | 5,801.05 mi (9,335.90 km) |
| Lake Oswego to Cumpana | 6,005.21 mi (9,664.45 km) |
