| Seattle to Popovo | 5,865.93 mi (9,440.30 km) |
| Seattle to Provadia | 5,897.67 mi (9,491.39 km) |
| Seattle to Radnevo | 5,928.39 mi (9,540.82 km) |
| Seattle to Radomir | 5,855.95 mi (9,424.25 km) |
| Seattle to Rakitovo | 5,914.18 mi (9,517.96 km) |
| Seattle to Rakovski | 5,911.31 mi (9,513.33 km) |
| Seattle to Razgrad | 5,859.07 mi (9,429.27 km) |
| Seattle to Razlog | 5,908.63 mi (9,509.02 km) |
| Seattle to Ruse | 5,830.41 mi (9,383.14 km) |
| Seattle to Samokov | 5,881.35 mi (9,465.12 km) |
| Seattle to Sandanski | 5,925.15 mi (9,535.60 km) |
| Seattle to Sevlievo | 5,866.62 mi (9,441.41 km) |
| Seattle to Shumen | 5,882.54 mi (9,467.04 km) |
| Seattle to Silistra | 5,834.08 mi (9,389.04 km) |
| Seattle to Sliven | 5,910.82 mi (9,512.55 km) |
