| Harrow to Wodzislaw Slaski | 825.88 mi (1,329.13 km) |
| Harrow to Wolomin | 917.45 mi (1,476.49 km) |
| Harrow to Wolow | 729.26 mi (1,173.63 km) |
| Harrow to Wolsztyn | 702.10 mi (1,129.93 km) |
| Harrow to Wroclaw | 748.95 mi (1,205.32 km) |
| Harrow to Wronki | 711.94 mi (1,145.76 km) |
| Harrow to Wrzesnia | 763.19 mi (1,228.24 km) |
| Harrow to Wschowa | 712.29 mi (1,146.32 km) |
| Harrow to Wysokie Mazowieckie | 967.24 mi (1,556.62 km) |
| Harrow to Wyszkow | 924.77 mi (1,488.28 km) |
| Harrow to Zabki | 912.19 mi (1,468.03 km) |
| Harrow to Zabkowice Slaskie | 746.40 mi (1,201.22 km) |
| Harrow to Zabrze | 834.86 mi (1,343.58 km) |
| Harrow to Zagan | 670.93 mi (1,079.76 km) |
| Harrow to Zakopane | 903.87 mi (1,454.64 km) |
