| Petaluma to Popovo | 6,471.61 mi (10,415.06 km) |
| Petaluma to Provadia | 6,506.32 mi (10,470.91 km) |
| Petaluma to Radnevo | 6,531.60 mi (10,511.60 km) |
| Petaluma to Radomir | 6,450.88 mi (10,381.68 km) |
| Petaluma to Rakitovo | 6,511.48 mi (10,479.21 km) |
| Petaluma to Rakovski | 6,511.73 mi (10,479.61 km) |
| Petaluma to Razgrad | 6,465.80 mi (10,405.70 km) |
| Petaluma to Razlog | 6,503.88 mi (10,466.99 km) |
| Petaluma to Ruse | 6,436.07 mi (10,357.85 km) |
| Petaluma to Samokov | 6,477.70 mi (10,424.85 km) |
| Petaluma to Sandanski | 6,519.25 mi (10,491.72 km) |
| Petaluma to Sevlievo | 6,468.69 mi (10,410.35 km) |
| Petaluma to Shumen | 6,490.01 mi (10,444.66 km) |
| Petaluma to Silistra | 6,443.61 mi (10,369.99 km) |
| Petaluma to Sliven | 6,515.75 mi (10,486.09 km) |
