| Boulder to Selargius | 5,574.82 mi (8,971.81 km) |
| Boulder to Selvazzano Dentro | 5,367.41 mi (8,638.01 km) |
| Boulder to Senago | 5,266.74 mi (8,476.01 km) |
| Boulder to Senigallia | 5,499.64 mi (8,850.81 km) |
| Boulder to Seravezza | 5,381.93 mi (8,661.38 km) |
| Boulder to Seregno | 5,265.85 mi (8,474.57 km) |
| Boulder to Seriate | 5,282.08 mi (8,500.68 km) |
| Boulder to Sermoneta | 5,600.55 mi (9,013.21 km) |
| Boulder to Serramanna | 5,557.53 mi (8,943.98 km) |
| Boulder to Serravalle Pistoiese | 5,407.86 mi (8,703.12 km) |
| Boulder to Sessa Aurunca | 5,650.05 mi (9,092.88 km) |
| Boulder to Sesto Calende | 5,242.17 mi (8,436.45 km) |
| Boulder to Sesto Fiorentino | 5,423.96 mi (8,729.01 km) |
| Boulder to Sesto San Giovanni | 5,272.62 mi (8,485.47 km) |
| Boulder to Sestri Levante | 5,339.05 mi (8,592.37 km) |
