| Avenal to Smolyan | 6,630.77 mi (10,671.20 km) |
| Avenal to Sofia | 6,529.52 mi (10,508.24 km) |
| Avenal to Sopot | 6,566.83 mi (10,568.30 km) |
| Avenal to Sozopol | 6,648.86 mi (10,700.31 km) |
| Avenal to Sredets | 6,641.88 mi (10,689.07 km) |
| Avenal to Stamboliyski | 6,593.19 mi (10,610.71 km) |
| Avenal to Stara Zagora | 6,601.28 mi (10,623.74 km) |
| Avenal to Svilengrad | 6,655.12 mi (10,710.39 km) |
| Avenal to Svishtov | 6,521.67 mi (10,495.61 km) |
| Avenal to Targovishte | 6,572.28 mi (10,577.06 km) |
| Avenal to Teteven | 6,539.05 mi (10,523.59 km) |
| Avenal to Troyan | 6,551.79 mi (10,544.09 km) |
| Avenal to Tryavna | 6,571.16 mi (10,575.26 km) |
| Avenal to Tutrakan | 6,523.53 mi (10,498.61 km) |
| Avenal to Varna | 6,603.75 mi (10,627.70 km) |
