| Douai to Popovo | 1,190.20 mi (1,915.43 km) |
| Douai to Provadia | 1,247.49 mi (2,007.64 km) |
| Douai to Radnevo | 1,217.71 mi (1,959.72 km) |
| Douai to Radomir | 1,084.29 mi (1,745.00 km) |
| Douai to Rakitovo | 1,154.13 mi (1,857.39 km) |
| Douai to Rakovski | 1,177.88 mi (1,895.62 km) |
| Douai to Razgrad | 1,195.60 mi (1,924.14 km) |
| Douai to Razlog | 1,133.28 mi (1,823.84 km) |
| Douai to Ruse | 1,161.18 mi (1,868.73 km) |
| Douai to Samokov | 1,117.82 mi (1,798.96 km) |
| Douai to Sandanski | 1,139.44 mi (1,833.75 km) |
| Douai to Sevlievo | 1,155.01 mi (1,858.80 km) |
| Douai to Shumen | 1,222.47 mi (1,967.38 km) |
| Douai to Silistra | 1,207.09 mi (1,942.62 km) |
| Douai to Sliven | 1,219.52 mi (1,962.63 km) |
