| Gastonia to Popovo | 5,346.75 mi (8,604.76 km) |
| Gastonia to Provadia | 5,401.71 mi (8,693.21 km) |
| Gastonia to Radnevo | 5,378.29 mi (8,655.52 km) |
| Gastonia to Radomir | 5,245.24 mi (8,441.39 km) |
| Gastonia to Rakitovo | 5,315.14 mi (8,553.90 km) |
| Gastonia to Rakovski | 5,339.13 mi (8,592.51 km) |
| Gastonia to Razgrad | 5,350.45 mi (8,610.72 km) |
| Gastonia to Razlog | 5,293.50 mi (8,519.07 km) |
| Gastonia to Ruse | 5,315.94 mi (8,555.18 km) |
| Gastonia to Samokov | 5,278.91 mi (8,495.59 km) |
| Gastonia to Sandanski | 5,298.48 mi (8,527.08 km) |
| Gastonia to Sevlievo | 5,314.92 mi (8,553.53 km) |
| Gastonia to Shumen | 5,377.55 mi (8,654.33 km) |
| Gastonia to Silistra | 5,355.48 mi (8,618.82 km) |
| Gastonia to Sliven | 5,378.56 mi (8,655.96 km) |
