| South San Francisco to Castelfidardo | 6,190.23 mi (9,962.21 km) |
| South San Francisco to Castelfiorentino | 6,109.73 mi (9,832.66 km) |
| South San Francisco to Castelfranco di Sopra | 6,125.34 mi (9,857.79 km) |
| South San Francisco to Castelfranco di Sotto | 6,097.84 mi (9,813.52 km) |
| South San Francisco to Castelfranco Emilia | 6,055.86 mi (9,745.96 km) |
| South San Francisco to Castelfranco Veneto | 6,019.67 mi (9,687.72 km) |
| South San Francisco to Castellabate | 6,414.30 mi (10,322.81 km) |
| South San Francisco to Castellammare del Golfo | 6,483.73 mi (10,434.55 km) |
| South San Francisco to Castellammare di Stabia | 6,376.71 mi (10,262.33 km) |
| South San Francisco to Castellamonte | 5,915.60 mi (9,520.24 km) |
| South San Francisco to Castellana Grotte | 6,439.82 mi (10,363.89 km) |
| South San Francisco to Castellaneta | 6,448.33 mi (10,377.59 km) |
| South San Francisco to Castellanza | 5,937.26 mi (9,555.10 km) |
| South San Francisco to Castellarano | 6,049.91 mi (9,736.39 km) |
| South San Francisco to Castelleone | 5,979.83 mi (9,623.61 km) |
