| Gladbeck to Popovo | 1,059.20 mi (1,704.62 km) |
| Gladbeck to Provadia | 1,113.48 mi (1,791.97 km) |
| Gladbeck to Radnevo | 1,095.01 mi (1,762.24 km) |
| Gladbeck to Radomir | 973.11 mi (1,566.07 km) |
| Gladbeck to Rakitovo | 1,041.70 mi (1,676.45 km) |
| Gladbeck to Rakovski | 1,059.28 mi (1,704.75 km) |
| Gladbeck to Razgrad | 1,062.37 mi (1,709.72 km) |
| Gladbeck to Razlog | 1,024.58 mi (1,648.90 km) |
| Gladbeck to Ruse | 1,027.89 mi (1,654.23 km) |
| Gladbeck to Samokov | 1,005.30 mi (1,617.87 km) |
| Gladbeck to Sandanski | 1,033.99 mi (1,664.04 km) |
| Gladbeck to Sevlievo | 1,030.54 mi (1,658.49 km) |
| Gladbeck to Shumen | 1,089.49 mi (1,753.37 km) |
| Gladbeck to Silistra | 1,067.57 mi (1,718.08 km) |
| Gladbeck to Sliven | 1,092.68 mi (1,758.50 km) |
