| South San Francisco to Collegno | 5,928.18 mi (9,540.49 km) |
| South San Francisco to Cologno al Serio | 5,962.03 mi (9,594.96 km) |
| South San Francisco to Cologno Monzese | 5,953.03 mi (9,580.48 km) |
| South San Francisco to Colorno | 6,017.89 mi (9,684.86 km) |
| South San Francisco to Comacchio | 6,081.64 mi (9,787.46 km) |
| South San Francisco to Comiso | 6,597.69 mi (10,617.96 km) |
| South San Francisco to Como | 5,931.86 mi (9,546.40 km) |
| South San Francisco to Concordia Sagittaria | 6,038.82 mi (9,718.54 km) |
| South San Francisco to Concorezzo | 5,951.28 mi (9,577.66 km) |
| South San Francisco to Conegliano | 6,017.04 mi (9,683.48 km) |
| South San Francisco to Conselice | 6,082.35 mi (9,788.59 km) |
| South San Francisco to Conselve | 6,042.50 mi (9,724.47 km) |
| South San Francisco to Conversano | 6,433.54 mi (10,353.78 km) |
| South San Francisco to Copertino | 6,500.10 mi (10,460.90 km) |
| South San Francisco to Copparo | 6,060.54 mi (9,753.50 km) |
