| Mercer Island to Castelfidardo | 5,595.30 mi (9,004.76 km) |
| Mercer Island to Castelfiorentino | 5,524.05 mi (8,890.10 km) |
| Mercer Island to Castelfranco di Sopra | 5,537.34 mi (8,911.49 km) |
| Mercer Island to Castelfranco di Sotto | 5,512.64 mi (8,871.74 km) |
| Mercer Island to Castelfranco Emilia | 5,466.54 mi (8,797.54 km) |
| Mercer Island to Castelfranco Veneto | 5,423.72 mi (8,728.64 km) |
| Mercer Island to Castellabate | 5,823.63 mi (9,372.22 km) |
| Mercer Island to Castellammare del Golfo | 5,908.95 mi (9,509.54 km) |
| Mercer Island to Castellammare di Stabia | 5,786.66 mi (9,312.74 km) |
| Mercer Island to Castellamonte | 5,335.92 mi (8,587.33 km) |
| Mercer Island to Castellana Grotte | 5,838.76 mi (9,396.58 km) |
| Mercer Island to Castellaneta | 5,848.85 mi (9,412.82 km) |
| Mercer Island to Castellanza | 5,352.36 mi (8,613.79 km) |
| Mercer Island to Castellarano | 5,461.68 mi (8,789.73 km) |
| Mercer Island to Castelleone | 5,392.90 mi (8,679.03 km) |
