| Boulder City to Selargius | 6,144.38 mi (9,888.43 km) |
| Boulder City to Selvazzano Dentro | 5,915.43 mi (9,519.97 km) |
| Boulder City to Senago | 5,819.92 mi (9,366.26 km) |
| Boulder City to Senigallia | 6,049.19 mi (9,735.23 km) |
| Boulder City to Seravezza | 5,937.28 mi (9,555.13 km) |
| Boulder City to Seregno | 5,818.70 mi (9,364.29 km) |
| Boulder City to Seriate | 5,833.73 mi (9,388.48 km) |
| Boulder City to Sermoneta | 6,156.54 mi (9,907.99 km) |
| Boulder City to Serramanna | 6,127.15 mi (9,860.69 km) |
| Boulder City to Serravalle Pistoiese | 5,962.22 mi (9,595.26 km) |
| Boulder City to Sessa Aurunca | 6,204.73 mi (9,985.54 km) |
| Boulder City to Sesto Calende | 5,795.95 mi (9,327.67 km) |
| Boulder City to Sesto Fiorentino | 5,977.70 mi (9,620.18 km) |
| Boulder City to Sesto San Giovanni | 5,825.74 mi (9,375.62 km) |
| Boulder City to Sestri Levante | 5,895.40 mi (9,487.73 km) |
