| Allouez to Smolyan | 5,182.22 mi (8,339.98 km) |
| Allouez to Sofia | 5,077.94 mi (8,172.15 km) |
| Allouez to Sopot | 5,130.10 mi (8,256.10 km) |
| Allouez to Sozopol | 5,243.15 mi (8,438.03 km) |
| Allouez to Sredets | 5,229.63 mi (8,416.28 km) |
| Allouez to Stamboliyski | 5,148.59 mi (8,285.86 km) |
| Allouez to Stara Zagora | 5,172.25 mi (8,323.92 km) |
| Allouez to Svilengrad | 5,225.27 mi (8,409.26 km) |
| Allouez to Svishtov | 5,101.96 mi (8,210.81 km) |
| Allouez to Targovishte | 5,162.51 mi (8,308.25 km) |
| Allouez to Teteven | 5,099.88 mi (8,207.47 km) |
| Allouez to Troyan | 5,117.19 mi (8,235.32 km) |
| Allouez to Tryavna | 5,145.06 mi (8,280.17 km) |
| Allouez to Tutrakan | 5,122.77 mi (8,244.30 km) |
| Allouez to Varna | 5,209.05 mi (8,383.15 km) |
