| Grefrath to Pyskowice | 538.78 mi (867.08 km) |
| Grefrath to Raciborz | 526.88 mi (847.93 km) |
| Grefrath to Radom | 638.00 mi (1,026.76 km) |
| Grefrath to Radomsko | 567.08 mi (912.63 km) |
| Grefrath to Radzionkow Nowy | 550.28 mi (885.59 km) |
| Grefrath to Radzymin | 636.35 mi (1,024.11 km) |
| Grefrath to Radzyn Podlaski | 698.68 mi (1,124.42 km) |
| Grefrath to Rawa Mazowiecka | 597.56 mi (961.67 km) |
| Grefrath to Rawicz | 452.61 mi (728.41 km) |
| Grefrath to Reda | 547.72 mi (881.46 km) |
| Grefrath to Rogozno | 462.91 mi (744.99 km) |
| Grefrath to Ropczyce | 673.23 mi (1,083.47 km) |
| Grefrath to Ruda Slaska | 550.75 mi (886.34 km) |
| Grefrath to Rumia | 548.46 mi (882.67 km) |
| Grefrath to Rury | 697.59 mi (1,122.67 km) |
