| Watford to Kavak | 1,860.60 mi (2,994.34 km) |
| Watford to Kayapinar | 2,167.76 mi (3,488.68 km) |
| Watford to Kayseri | 1,936.08 mi (3,115.82 km) |
| Watford to Kemalpasa | 1,621.02 mi (2,608.79 km) |
| Watford to Kemer | 1,832.34 mi (2,948.87 km) |
| Watford to Keskin | 1,816.74 mi (2,923.77 km) |
| Watford to Kilimli | 1,666.71 mi (2,682.31 km) |
| Watford to Kilis | 2,093.72 mi (3,369.52 km) |
| Watford to Kinik | 1,588.19 mi (2,555.95 km) |
| Watford to Kirikkale | 1,805.37 mi (2,905.46 km) |
| Watford to Kirkagac | 1,599.39 mi (2,573.97 km) |
| Watford to Kirklareli | 1,465.19 mi (2,357.99 km) |
| Watford to Kirsehir | 1,862.34 mi (2,997.15 km) |
| Watford to Kizilpinar | 1,515.31 mi (2,438.66 km) |
| Watford to Kiziltepe | 2,217.34 mi (3,568.46 km) |
