| Boston to San Lorenzo de Descardazar | 936.57 mi (1,507.26 km) |
| Boston to San Lorenzo de El Escorial | 876.97 mi (1,411.34 km) |
| Boston to San Martin de la Vega | 897.63 mi (1,444.59 km) |
| Boston to San Martin de Valdeiglesias | 895.24 mi (1,440.74 km) |
| Boston to San Pedro de Ribas | 813.73 mi (1,309.57 km) |
| Boston to San Roque | 1,187.14 mi (1,910.52 km) |
| Boston to San Sebastian de la Gomera | 1,928.05 mi (3,102.90 km) |
| Boston to San Sebastian de los Reyes | 875.12 mi (1,408.38 km) |
| Boston to San Vicente de Baracaldo | 682.33 mi (1,098.10 km) |
| Boston to San Vicente de Castellet | 786.24 mi (1,265.34 km) |
| Boston to San Vicente del Raspeig | 1,007.50 mi (1,621.42 km) |
| Boston to San Vicente dels Horts | 805.73 mi (1,296.70 km) |
| Boston to Sangenjo | 835.58 mi (1,344.73 km) |
| Boston to Sanlucar de Barrameda | 1,160.78 mi (1,868.10 km) |
| Boston to Sanlucar la Mayor | 1,117.43 mi (1,798.34 km) |
