| Olton to Castelfidardo | 939.48 mi (1,511.94 km) |
| Olton to Castelfiorentino | 846.91 mi (1,362.97 km) |
| Olton to Castelfranco di Sopra | 864.68 mi (1,391.56 km) |
| Olton to Castelfranco di Sotto | 834.70 mi (1,343.31 km) |
| Olton to Castelfranco Emilia | 797.75 mi (1,283.85 km) |
| Olton to Castelfranco Veneto | 776.28 mi (1,249.30 km) |
| Olton to Castellabate | 1,153.97 mi (1,857.13 km) |
| Olton to Castellammare del Golfo | 1,220.57 mi (1,964.31 km) |
| Olton to Castellammare di Stabia | 1,116.05 mi (1,796.11 km) |
| Olton to Castellamonte | 650.43 mi (1,046.77 km) |
| Olton to Castellana Grotte | 1,196.17 mi (1,925.05 km) |
| Olton to Castellaneta | 1,201.07 mi (1,932.93 km) |
| Olton to Castellanza | 674.97 mi (1,086.26 km) |
| Olton to Castellarano | 790.34 mi (1,271.93 km) |
| Olton to Castelleone | 719.43 mi (1,157.80 km) |
