| Apen to Popovo | 1,082.00 mi (1,741.32 km) |
| Apen to Provadia | 1,132.83 mi (1,823.11 km) |
| Apen to Radnevo | 1,124.63 mi (1,809.92 km) |
| Apen to Radomir | 1,013.68 mi (1,631.36 km) |
| Apen to Rakitovo | 1,080.33 mi (1,738.62 km) |
| Apen to Rakovski | 1,092.77 mi (1,758.64 km) |
| Apen to Razgrad | 1,083.07 mi (1,743.03 km) |
| Apen to Razlog | 1,066.29 mi (1,716.02 km) |
| Apen to Ruse | 1,048.99 mi (1,688.19 km) |
| Apen to Samokov | 1,044.36 mi (1,680.74 km) |
| Apen to Sandanski | 1,077.99 mi (1,734.86 km) |
| Apen to Sevlievo | 1,059.50 mi (1,705.09 km) |
| Apen to Shumen | 1,110.08 mi (1,786.50 km) |
| Apen to Silistra | 1,082.15 mi (1,741.55 km) |
| Apen to Sliven | 1,118.77 mi (1,800.49 km) |
