| Westbrook to Popovo | 4,529.04 mi (7,288.78 km) |
| Westbrook to Provadia | 4,583.59 mi (7,376.58 km) |
| Westbrook to Radnevo | 4,561.75 mi (7,341.42 km) |
| Westbrook to Radomir | 4,430.38 mi (7,130.01 km) |
| Westbrook to Rakitovo | 4,500.22 mi (7,242.40 km) |
| Westbrook to Rakovski | 4,523.22 mi (7,279.41 km) |
| Westbrook to Razgrad | 4,532.46 mi (7,294.29 km) |
| Westbrook to Razlog | 4,479.18 mi (7,208.54 km) |
| Westbrook to Ruse | 4,497.97 mi (7,238.78 km) |
| Westbrook to Samokov | 4,463.90 mi (7,183.96 km) |
| Westbrook to Sandanski | 4,484.76 mi (7,217.52 km) |
| Westbrook to Sevlievo | 4,498.10 mi (7,238.99 km) |
| Westbrook to Shumen | 4,559.58 mi (7,337.93 km) |
| Westbrook to Silistra | 4,536.79 mi (7,301.26 km) |
| Westbrook to Sliven | 4,561.41 mi (7,340.88 km) |
