| Harrow to Dobrova | 770.60 mi (1,240.16 km) |
| Harrow to Dobrovnik | 825.84 mi (1,329.06 km) |
| Harrow to Dobrovo | 738.36 mi (1,188.28 km) |
| Harrow to Dol | 778.19 mi (1,252.37 km) |
| Harrow to Dolenjske Toplice | 807.80 mi (1,300.02 km) |
| Harrow to Domzale | 774.31 mi (1,246.14 km) |
| Harrow to Dornava | 817.51 mi (1,315.66 km) |
| Harrow to Dragomer | 770.70 mi (1,240.32 km) |
| Harrow to Dravograd | 774.31 mi (1,246.13 km) |
| Harrow to Gorenja Vas | 757.91 mi (1,219.74 km) |
| Harrow to Gorisnica | 820.76 mi (1,320.89 km) |
| Harrow to Gornja Radgona | 810.50 mi (1,304.38 km) |
| Harrow to Gornji Grad | 776.59 mi (1,249.79 km) |
| Harrow to Gornji Petrovci | 815.15 mi (1,311.86 km) |
| Harrow to Grad | 810.54 mi (1,304.44 km) |
