| Bothell West to Popovo | 5,852.65 mi (9,418.93 km) |
| Bothell West to Provadia | 5,884.38 mi (9,469.99 km) |
| Bothell West to Radnevo | 5,915.12 mi (9,519.47 km) |
| Bothell West to Radomir | 5,842.74 mi (9,402.99 km) |
| Bothell West to Rakitovo | 5,900.95 mi (9,496.67 km) |
| Bothell West to Rakovski | 5,898.06 mi (9,492.01 km) |
| Bothell West to Razgrad | 5,845.79 mi (9,407.89 km) |
| Bothell West to Razlog | 5,895.42 mi (9,487.76 km) |
| Bothell West to Ruse | 5,817.13 mi (9,361.77 km) |
| Bothell West to Samokov | 5,868.13 mi (9,443.85 km) |
| Bothell West to Sandanski | 5,911.94 mi (9,514.35 km) |
| Bothell West to Sevlievo | 5,853.36 mi (9,420.08 km) |
| Bothell West to Shumen | 5,869.26 mi (9,445.66 km) |
| Bothell West to Silistra | 5,820.78 mi (9,367.64 km) |
| Bothell West to Sliven | 5,897.55 mi (9,491.18 km) |
