| Olbia to Clay Cross | 987.49 mi (1,589.21 km) |
| Olbia to Clayton | 1,031.89 mi (1,660.66 km) |
| Olbia to Clayton le Moors | 1,045.14 mi (1,681.99 km) |
| Olbia to Cleckheaton | 1,026.45 mi (1,651.90 km) |
| Olbia to Cleethorpes | 978.74 mi (1,575.14 km) |
| Olbia to Clevedon | 934.29 mi (1,503.59 km) |
| Olbia to Clifton | 967.19 mi (1,556.54 km) |
| Olbia to Clifton | 1,026.49 mi (1,651.98 km) |
| Olbia to Cliftonville | 819.56 mi (1,318.96 km) |
| Olbia to Clitheroe | 1,050.66 mi (1,690.88 km) |
| Olbia to Clydebank | 1,210.73 mi (1,948.49 km) |
| Olbia to Coalville | 961.80 mi (1,547.87 km) |
| Olbia to Coatbridge | 1,200.01 mi (1,931.23 km) |
| Olbia to Cobham | 860.13 mi (1,384.25 km) |
| Olbia to Cockermouth | 1,117.84 mi (1,798.98 km) |
