| Petaluma to Smolyan | 6,550.07 mi (10,541.32 km) |
| Petaluma to Sofia | 6,450.13 mi (10,380.49 km) |
| Petaluma to Sopot | 6,484.44 mi (10,435.70 km) |
| Petaluma to Sozopol | 6,560.35 mi (10,557.87 km) |
| Petaluma to Sredets | 6,554.56 mi (10,548.54 km) |
| Petaluma to Stamboliyski | 6,512.04 mi (10,480.11 km) |
| Petaluma to Stara Zagora | 6,517.24 mi (10,488.49 km) |
| Petaluma to Svilengrad | 6,570.82 mi (10,574.72 km) |
| Petaluma to Svishtov | 6,436.58 mi (10,358.67 km) |
| Petaluma to Targovishte | 6,485.06 mi (10,436.69 km) |
| Petaluma to Teteven | 6,457.31 mi (10,392.04 km) |
| Petaluma to Troyan | 6,469.13 mi (10,411.06 km) |
| Petaluma to Tryavna | 6,486.82 mi (10,439.53 km) |
| Petaluma to Tutrakan | 6,435.13 mi (10,356.35 km) |
| Petaluma to Varna | 6,513.70 mi (10,482.78 km) |
