| Grefrath to Montana | 957.65 mi (1,541.18 km) |
| Grefrath to Nova Zagora | 1,106.15 mi (1,780.18 km) |
| Grefrath to Novi Iskar | 990.36 mi (1,593.82 km) |
| Grefrath to Novi Pazar | 1,116.01 mi (1,796.05 km) |
| Grefrath to Omurtag | 1,095.31 mi (1,762.73 km) |
| Grefrath to Panagyurishte | 1,035.62 mi (1,666.67 km) |
| Grefrath to Parvomay | 1,093.30 mi (1,759.50 km) |
| Grefrath to Pavlikeni | 1,046.01 mi (1,683.40 km) |
| Grefrath to Pazardzhik | 1,055.28 mi (1,698.31 km) |
| Grefrath to Pernik | 987.99 mi (1,590.01 km) |
| Grefrath to Peshtera | 1,061.91 mi (1,708.98 km) |
| Grefrath to Petrich | 1,053.08 mi (1,694.77 km) |
| Grefrath to Pleven | 1,011.45 mi (1,627.77 km) |
| Grefrath to Plovdiv | 1,073.30 mi (1,727.31 km) |
| Grefrath to Pomorie | 1,165.76 mi (1,876.10 km) |
