| Lake Oswego to Cortona | 5,707.17 mi (9,184.81 km) |
| Lake Oswego to Cosenza | 6,054.41 mi (9,743.64 km) |
| Lake Oswego to Cossato | 5,473.78 mi (8,809.19 km) |
| Lake Oswego to Costa Volpino | 5,507.95 mi (8,864.19 km) |
| Lake Oswego to Creazzo | 5,560.07 mi (8,948.07 km) |
| Lake Oswego to Crema | 5,524.67 mi (8,891.10 km) |
| Lake Oswego to Cremona | 5,547.33 mi (8,927.57 km) |
| Lake Oswego to Crevalcore | 5,600.25 mi (9,012.72 km) |
| Lake Oswego to Crispiano | 5,998.32 mi (9,653.36 km) |
| Lake Oswego to Crosia | 6,050.70 mi (9,737.66 km) |
| Lake Oswego to Crotone | 6,088.95 mi (9,799.22 km) |
| Lake Oswego to Cuneo | 5,526.13 mi (8,893.45 km) |
| Lake Oswego to Cuorgne | 5,470.46 mi (8,803.86 km) |
| Lake Oswego to Cusano Milanino | 5,501.11 mi (8,853.17 km) |
| Lake Oswego to Cutro | 6,088.79 mi (9,798.97 km) |
