| Portlethen to Popovo | 1,552.97 mi (2,499.26 km) |
| Portlethen to Provadia | 1,602.39 mi (2,578.80 km) |
| Portlethen to Radnevo | 1,597.15 mi (2,570.36 km) |
| Portlethen to Radomir | 1,486.42 mi (2,392.17 km) |
| Portlethen to Rakitovo | 1,553.29 mi (2,499.79 km) |
| Portlethen to Rakovski | 1,565.75 mi (2,519.82 km) |
| Portlethen to Razgrad | 1,553.31 mi (2,499.82 km) |
| Portlethen to Razlog | 1,538.92 mi (2,476.65 km) |
| Portlethen to Ruse | 1,519.48 mi (2,445.37 km) |
| Portlethen to Samokov | 1,517.28 mi (2,441.83 km) |
| Portlethen to Sandanski | 1,550.23 mi (2,494.85 km) |
| Portlethen to Sevlievo | 1,531.98 mi (2,465.48 km) |
| Portlethen to Shumen | 1,580.20 mi (2,543.09 km) |
| Portlethen to Silistra | 1,549.74 mi (2,494.07 km) |
| Portlethen to Sliven | 1,590.58 mi (2,559.79 km) |
