| Round Rock to Sesena | 5,088.19 mi (8,188.65 km) |
| Round Rock to Sestao | 5,022.48 mi (8,082.90 km) |
| Round Rock to Sevilla | 5,064.58 mi (8,150.66 km) |
| Round Rock to Sevilla La Nueva | 5,065.10 mi (8,151.49 km) |
| Round Rock to Silla | 5,266.86 mi (8,476.20 km) |
| Round Rock to Silleda | 4,799.67 mi (7,724.32 km) |
| Round Rock to Sitges | 5,306.81 mi (8,540.49 km) |
| Round Rock to Socuellamos | 5,156.31 mi (8,298.28 km) |
| Round Rock to Soller | 5,397.84 mi (8,686.98 km) |
| Round Rock to Solsona | 5,268.36 mi (8,478.60 km) |
| Round Rock to Son Servera | 5,433.23 mi (8,743.94 km) |
| Round Rock to Sonseca | 5,088.63 mi (8,189.36 km) |
| Round Rock to Sopelana | 5,021.54 mi (8,081.38 km) |
| Round Rock to Soria | 5,094.35 mi (8,198.56 km) |
| Round Rock to Suances | 4,971.52 mi (8,000.89 km) |
