| Seaham to Castelletto sopra Ticino | 767.33 mi (1,234.90 km) |
| Seaham to Castelli Calepio | 805.04 mi (1,295.59 km) |
| Seaham to Castelnovo ne' Monti | 887.98 mi (1,429.06 km) |
| Seaham to Castelnuovo Berardenga | 980.70 mi (1,578.28 km) |
| Seaham to Castelnuovo di Porto | 1,078.62 mi (1,735.87 km) |
| Seaham to Castelnuovo di Verona | 840.14 mi (1,352.07 km) |
| Seaham to Castelnuovo Rangone | 895.27 mi (1,440.80 km) |
| Seaham to Castelvetrano | 1,358.36 mi (2,186.07 km) |
| Seaham to Castelvetro di Modena | 898.62 mi (1,446.18 km) |
| Seaham to Castenaso | 912.22 mi (1,468.07 km) |
| Seaham to Castenedolo | 825.10 mi (1,327.87 km) |
| Seaham to Castiglion Fiorentino | 991.89 mi (1,596.29 km) |
| Seaham to Castiglione del Lago | 1,007.35 mi (1,621.18 km) |
| Seaham to Castiglione delle Stiviere | 834.67 mi (1,343.27 km) |
| Seaham to Castrolibero | 1,345.34 mi (2,165.12 km) |
