| Duffel to Zulte | 48.77 mi (78.49 km) |
| Duffel to Zwevegem | 55.53 mi (89.36 km) |
| Duffel to Zwijndrecht | 11.32 mi (18.22 km) |
| Duffel to Asenovgrad | 1,146.70 mi (1,845.43 km) |
| Duffel to Aytos | 1,213.03 mi (1,952.19 km) |
| Duffel to Balchik | 1,221.68 mi (1,966.11 km) |
| Duffel to Bankya | 1,048.58 mi (1,687.53 km) |
| Duffel to Bansko | 1,101.36 mi (1,772.46 km) |
| Duffel to Berkovitsa | 1,024.61 mi (1,648.95 km) |
| Duffel to Blagoevgrad | 1,078.09 mi (1,735.02 km) |
| Duffel to Botevgrad | 1,065.36 mi (1,714.54 km) |
| Duffel to Burgas | 1,230.14 mi (1,979.72 km) |
| Duffel to Byala Slatina | 1,047.17 mi (1,685.26 km) |
| Duffel to Chirpan | 1,156.67 mi (1,861.48 km) |
| Duffel to Devnya | 1,205.23 mi (1,939.63 km) |
