| Gloucester to Sesena | 815.54 mi (1,312.48 km) |
| Gloucester to Sestao | 592.05 mi (952.81 km) |
| Gloucester to Sevilla | 1,026.78 mi (1,652.45 km) |
| Gloucester to Sevilla La Nueva | 800.25 mi (1,287.88 km) |
| Gloucester to Silla | 868.31 mi (1,397.41 km) |
| Gloucester to Silleda | 692.06 mi (1,113.76 km) |
| Gloucester to Sitges | 758.96 mi (1,221.43 km) |
| Gloucester to Socuellamos | 868.98 mi (1,398.49 km) |
| Gloucester to Soller | 868.60 mi (1,397.88 km) |
| Gloucester to Solsona | 704.43 mi (1,133.66 km) |
| Gloucester to Son Servera | 887.40 mi (1,428.13 km) |
| Gloucester to Sonseca | 844.42 mi (1,358.97 km) |
| Gloucester to Sopelana | 587.11 mi (944.86 km) |
| Gloucester to Soria | 697.76 mi (1,122.94 km) |
| Gloucester to Suances | 588.51 mi (947.12 km) |
