| Giffnock to Popovo | 1,596.12 mi (2,568.71 km) |
| Giffnock to Provadia | 1,648.03 mi (2,652.25 km) |
| Giffnock to Radnevo | 1,635.87 mi (2,632.68 km) |
| Giffnock to Radomir | 1,517.48 mi (2,442.15 km) |
| Giffnock to Rakitovo | 1,585.73 mi (2,551.99 km) |
| Giffnock to Rakovski | 1,601.76 mi (2,577.78 km) |
| Giffnock to Razgrad | 1,597.85 mi (2,571.49 km) |
| Giffnock to Razlog | 1,569.19 mi (2,525.36 km) |
| Giffnock to Ruse | 1,563.61 mi (2,516.38 km) |
| Giffnock to Samokov | 1,549.39 mi (2,493.51 km) |
| Giffnock to Sandanski | 1,578.87 mi (2,540.94 km) |
| Giffnock to Sevlievo | 1,570.98 mi (2,528.25 km) |
| Giffnock to Shumen | 1,624.93 mi (2,615.06 km) |
| Giffnock to Silistra | 1,598.23 mi (2,572.10 km) |
| Giffnock to Sliven | 1,631.68 mi (2,625.93 km) |
