| Mequon to Smolyan | 5,240.65 mi (8,434.02 km) |
| Mequon to Sofia | 5,136.42 mi (8,266.27 km) |
| Mequon to Sopot | 5,189.39 mi (8,351.51 km) |
| Mequon to Sozopol | 5,304.01 mi (8,535.98 km) |
| Mequon to Sredets | 5,290.15 mi (8,513.67 km) |
| Mequon to Stamboliyski | 5,207.35 mi (8,380.42 km) |
| Mequon to Stara Zagora | 5,231.90 mi (8,419.93 km) |
| Mequon to Svilengrad | 5,284.75 mi (8,504.99 km) |
| Mequon to Svishtov | 5,162.33 mi (8,307.97 km) |
| Mequon to Targovishte | 5,223.32 mi (8,406.12 km) |
| Mequon to Teteven | 5,159.09 mi (8,302.75 km) |
| Mequon to Troyan | 5,176.63 mi (8,330.99 km) |
| Mequon to Tryavna | 5,204.95 mi (8,376.56 km) |
| Mequon to Tutrakan | 5,184.19 mi (8,343.15 km) |
| Mequon to Varna | 5,270.61 mi (8,482.23 km) |
