| Grangemouth to Popovo | 1,580.10 mi (2,542.93 km) |
| Grangemouth to Provadia | 1,631.57 mi (2,625.75 km) |
| Grangemouth to Radnevo | 1,620.71 mi (2,608.28 km) |
| Grangemouth to Radomir | 1,503.75 mi (2,420.05 km) |
| Grangemouth to Rakitovo | 1,571.76 mi (2,529.50 km) |
| Grangemouth to Rakovski | 1,587.10 mi (2,554.19 km) |
| Grangemouth to Razgrad | 1,581.57 mi (2,545.30 km) |
| Grangemouth to Razlog | 1,555.63 mi (2,503.55 km) |
| Grangemouth to Ruse | 1,547.39 mi (2,490.29 km) |
| Grangemouth to Samokov | 1,535.47 mi (2,471.10 km) |
| Grangemouth to Sandanski | 1,565.63 mi (2,519.65 km) |
| Grangemouth to Sevlievo | 1,555.74 mi (2,503.72 km) |
| Grangemouth to Shumen | 1,608.62 mi (2,588.83 km) |
| Grangemouth to Silistra | 1,581.22 mi (2,544.72 km) |
| Grangemouth to Sliven | 1,616.06 mi (2,600.80 km) |
