| Walla Walla to Popovo | 5,888.44 mi (9,476.53 km) |
| Walla Walla to Provadia | 5,923.01 mi (9,532.16 km) |
| Walla Walla to Radnevo | 5,948.62 mi (9,573.38 km) |
| Walla Walla to Radomir | 5,868.91 mi (9,445.10 km) |
| Walla Walla to Rakitovo | 5,929.17 mi (9,542.09 km) |
| Walla Walla to Rakovski | 5,929.03 mi (9,541.85 km) |
| Walla Walla to Razgrad | 5,882.57 mi (9,467.07 km) |
| Walla Walla to Razlog | 5,921.88 mi (9,530.35 km) |
| Walla Walla to Ruse | 5,852.89 mi (9,419.32 km) |
| Walla Walla to Samokov | 5,895.53 mi (9,487.93 km) |
| Walla Walla to Sandanski | 5,937.43 mi (9,555.38 km) |
| Walla Walla to Sevlievo | 5,885.81 mi (9,472.29 km) |
| Walla Walla to Shumen | 5,906.74 mi (9,505.98 km) |
| Walla Walla to Silistra | 5,860.27 mi (9,431.20 km) |
| Walla Walla to Sliven | 5,932.64 mi (9,547.66 km) |
