| Barstow to Popovo | 6,558.60 mi (10,555.04 km) |
| Barstow to Provadia | 6,597.99 mi (10,618.43 km) |
| Barstow to Radnevo | 6,614.14 mi (10,644.43 km) |
| Barstow to Radomir | 6,521.28 mi (10,494.99 km) |
| Barstow to Rakitovo | 6,584.96 mi (10,597.48 km) |
| Barstow to Rakovski | 6,590.01 mi (10,605.60 km) |
| Barstow to Razgrad | 6,554.54 mi (10,548.51 km) |
| Barstow to Razlog | 6,574.37 mi (10,580.42 km) |
| Barstow to Ruse | 6,523.27 mi (10,498.19 km) |
| Barstow to Samokov | 6,550.03 mi (10,541.25 km) |
| Barstow to Sandanski | 6,587.91 mi (10,602.22 km) |
| Barstow to Sevlievo | 6,549.88 mi (10,541.02 km) |
| Barstow to Shumen | 6,579.81 mi (10,589.18 km) |
| Barstow to Silistra | 6,537.22 mi (10,520.65 km) |
| Barstow to Sliven | 6,601.19 mi (10,623.58 km) |
