| Skien to Popovo | 1,303.52 mi (2,097.81 km) |
| Skien to Provadia | 1,341.72 mi (2,159.29 km) |
| Skien to Radnevo | 1,361.92 mi (2,191.80 km) |
| Skien to Radomir | 1,285.12 mi (2,068.20 km) |
| Skien to Rakitovo | 1,343.31 mi (2,161.86 km) |
| Skien to Rakovski | 1,341.94 mi (2,159.65 km) |
| Skien to Razgrad | 1,298.79 mi (2,090.21 km) |
| Skien to Razlog | 1,337.71 mi (2,152.84 km) |
| Skien to Ruse | 1,268.05 mi (2,040.74 km) |
| Skien to Samokov | 1,310.37 mi (2,108.84 km) |
| Skien to Sandanski | 1,354.48 mi (2,179.83 km) |
| Skien to Sevlievo | 1,298.80 mi (2,090.21 km) |
| Skien to Shumen | 1,323.81 mi (2,130.46 km) |
| Skien to Silistra | 1,281.00 mi (2,061.57 km) |
| Skien to Sliven | 1,346.96 mi (2,167.71 km) |
