| Seattle to Castelfidardo | 5,594.24 mi (9,003.06 km) |
| Seattle to Castelfiorentino | 5,523.15 mi (8,888.65 km) |
| Seattle to Castelfranco di Sopra | 5,536.40 mi (8,909.98 km) |
| Seattle to Castelfranco di Sotto | 5,511.75 mi (8,870.31 km) |
| Seattle to Castelfranco Emilia | 5,465.58 mi (8,796.00 km) |
| Seattle to Castelfranco Veneto | 5,422.66 mi (8,726.92 km) |
| Seattle to Castellabate | 5,822.62 mi (9,370.61 km) |
| Seattle to Castellammare del Golfo | 5,908.19 mi (9,508.32 km) |
| Seattle to Castellammare di Stabia | 5,785.67 mi (9,311.14 km) |
| Seattle to Castellamonte | 5,335.13 mi (8,586.06 km) |
| Seattle to Castellana Grotte | 5,837.58 mi (9,394.68 km) |
| Seattle to Castellaneta | 5,847.70 mi (9,410.96 km) |
| Seattle to Castellanza | 5,351.48 mi (8,612.37 km) |
| Seattle to Castellarano | 5,460.74 mi (8,788.22 km) |
| Seattle to Castelleone | 5,391.98 mi (8,677.56 km) |
