| Welwyn Garden City to Krosno Odrzanskie | 650.69 mi (1,047.19 km) |
| Welwyn Garden City to Krotoszyn | 752.27 mi (1,210.67 km) |
| Welwyn Garden City to Kruszwica | 783.78 mi (1,261.36 km) |
| Welwyn Garden City to Krynica | 938.46 mi (1,510.31 km) |
| Welwyn Garden City to Krzeszowice | 867.61 mi (1,396.28 km) |
| Welwyn Garden City to Kudowa-Zdroj | 717.31 mi (1,154.40 km) |
| Welwyn Garden City to Kutno | 829.67 mi (1,335.22 km) |
| Welwyn Garden City to Kwidzyn | 807.90 mi (1,300.18 km) |
| Welwyn Garden City to Lancut | 979.89 mi (1,576.99 km) |
| Welwyn Garden City to Lapy | 972.11 mi (1,564.46 km) |
| Welwyn Garden City to Lask | 825.35 mi (1,328.27 km) |
| Welwyn Garden City to Laziska Gorne | 833.84 mi (1,341.94 km) |
| Welwyn Garden City to Lebork | 764.50 mi (1,230.34 km) |
| Welwyn Garden City to Leczna | 987.87 mi (1,589.82 km) |
| Welwyn Garden City to Leczyca | 823.99 mi (1,326.08 km) |
