| Lake Oswego to Chivasso | 5,488.26 mi (8,832.50 km) |
| Lake Oswego to Ciampino | 5,811.05 mi (9,351.98 km) |
| Lake Oswego to Cicciano | 5,910.16 mi (9,511.48 km) |
| Lake Oswego to Cingoli | 5,732.45 mi (9,225.49 km) |
| Lake Oswego to Cinisello Balsamo | 5,501.96 mi (8,854.56 km) |
| Lake Oswego to Cinisi | 6,042.50 mi (9,724.47 km) |
| Lake Oswego to Cirie | 5,478.10 mi (8,816.15 km) |
| Lake Oswego to Ciro Marina | 6,071.60 mi (9,771.30 km) |
| Lake Oswego to Cislago | 5,489.68 mi (8,834.79 km) |
| Lake Oswego to Cisterna di Latina | 5,829.44 mi (9,381.58 km) |
| Lake Oswego to Cisternino | 5,994.84 mi (9,647.76 km) |
| Lake Oswego to Citta di Castello | 5,702.56 mi (9,177.38 km) |
| Lake Oswego to Citta Sant'Angelo | 5,804.28 mi (9,341.08 km) |
| Lake Oswego to Cittadella | 5,560.52 mi (8,948.79 km) |
| Lake Oswego to Cittanova | 6,108.48 mi (9,830.65 km) |
