| Hillsboro to Cognac | 5,230.41 mi (8,417.53 km) |
| Hillsboro to Cogolin | 5,563.68 mi (8,953.88 km) |
| Hillsboro to Colmar | 5,306.52 mi (8,540.02 km) |
| Hillsboro to Colombes | 5,125.17 mi (8,248.16 km) |
| Hillsboro to Colomiers | 5,394.60 mi (8,681.76 km) |
| Hillsboro to Combs-la-Ville | 5,147.58 mi (8,284.23 km) |
| Hillsboro to Comines | 5,043.04 mi (8,115.99 km) |
| Hillsboro to Compiegne | 5,113.14 mi (8,228.80 km) |
| Hillsboro to Concarneau | 5,006.72 mi (8,057.53 km) |
| Hillsboro to Conde-sur-l'Escaut | 5,075.52 mi (8,168.26 km) |
| Hillsboro to Conflans-Sainte-Honorine | 5,116.81 mi (8,234.71 km) |
| Hillsboro to Corbas | 5,380.36 mi (8,658.85 km) |
| Hillsboro to Corbeil-Essonnes | 5,148.60 mi (8,285.87 km) |
| Hillsboro to Cormeilles-en-Parisis | 5,121.00 mi (8,241.46 km) |
| Hillsboro to Cosne sur Loire | 5,227.85 mi (8,413.42 km) |
