| Oregon to Cocentaina | 4,204.51 mi (6,766.51 km) |
| Oregon to Coin | 4,078.99 mi (6,564.50 km) |
| Oregon to Colindres | 3,908.00 mi (6,289.32 km) |
| Oregon to Collado-Villalba | 3,974.83 mi (6,396.88 km) |
| Oregon to Colmenar Viejo | 3,985.03 mi (6,413.28 km) |
| Oregon to Colmenarejo | 3,976.91 mi (6,400.21 km) |
| Oregon to Conil de la Frontera | 4,029.92 mi (6,485.52 km) |
| Oregon to Consuegra | 4,033.58 mi (6,491.42 km) |
| Oregon to Corbera de Llobregat | 4,214.03 mi (6,781.83 km) |
| Oregon to Cordoba | 4,034.28 mi (6,492.55 km) |
| Oregon to Coria del Rio | 3,995.54 mi (6,430.20 km) |
| Oregon to Crevillente | 4,205.75 mi (6,768.50 km) |
| Oregon to Cuarte de Huerva | 4,081.72 mi (6,568.90 km) |
| Oregon to Cubellas | 4,210.13 mi (6,775.55 km) |
| Oregon to Cuellar | 3,935.07 mi (6,332.89 km) |
