| Onalaska to Smolyan | 5,321.66 mi (8,564.38 km) |
| Onalaska to Sofia | 5,217.36 mi (8,396.53 km) |
| Onalaska to Sopot | 5,268.40 mi (8,478.67 km) |
| Onalaska to Sozopol | 5,379.13 mi (8,656.88 km) |
| Onalaska to Sredets | 5,366.13 mi (8,635.96 km) |
| Onalaska to Stamboliyski | 5,287.61 mi (8,509.59 km) |
| Onalaska to Stara Zagora | 5,310.01 mi (8,545.63 km) |
| Onalaska to Svilengrad | 5,363.25 mi (8,631.31 km) |
| Onalaska to Svishtov | 5,238.73 mi (8,430.91 km) |
| Onalaska to Targovishte | 5,298.60 mi (8,527.28 km) |
| Onalaska to Teteven | 5,238.31 mi (8,430.24 km) |
| Onalaska to Troyan | 5,255.27 mi (8,457.54 km) |
| Onalaska to Tryavna | 5,282.49 mi (8,501.35 km) |
| Onalaska to Tutrakan | 5,257.97 mi (8,461.89 km) |
| Onalaska to Varna | 5,343.99 mi (8,600.33 km) |
