| Gaithersburg to Sacile | 4,341.93 mi (6,987.67 km) |
| Gaithersburg to Sala Consilina | 4,675.00 mi (7,523.69 km) |
| Gaithersburg to Salemi | 4,645.98 mi (7,476.98 km) |
| Gaithersburg to Salerno | 4,627.42 mi (7,447.12 km) |
| Gaithersburg to Salo | 4,271.20 mi (6,873.83 km) |
| Gaithersburg to Salsomaggiore Terme | 4,273.38 mi (6,877.34 km) |
| Gaithersburg to Saluzzo | 4,170.90 mi (6,712.41 km) |
| Gaithersburg to Salzano | 4,340.49 mi (6,985.34 km) |
| Gaithersburg to Samarate | 4,195.95 mi (6,752.73 km) |
| Gaithersburg to San Benedetto del Tronto | 4,506.10 mi (7,251.87 km) |
| Gaithersburg to San Biagio di Callalta | 4,346.45 mi (6,994.93 km) |
| Gaithersburg to San Bonifacio | 4,309.70 mi (6,935.79 km) |
| Gaithersburg to San Casciano in Val di Pesa | 4,364.45 mi (7,023.91 km) |
| Gaithersburg to San Cataldo | 4,712.80 mi (7,584.52 km) |
| Gaithersburg to San Cesareo | 4,499.51 mi (7,241.27 km) |
