| Welwyn Garden City to Montana | 1,227.85 mi (1,976.04 km) |
| Welwyn Garden City to Nova Zagora | 1,378.97 mi (2,219.24 km) |
| Welwyn Garden City to Novi Iskar | 1,258.33 mi (2,025.08 km) |
| Welwyn Garden City to Novi Pazar | 1,393.18 mi (2,242.10 km) |
| Welwyn Garden City to Omurtag | 1,370.69 mi (2,205.91 km) |
| Welwyn Garden City to Panagyurishte | 1,304.48 mi (2,099.36 km) |
| Welwyn Garden City to Parvomay | 1,363.10 mi (2,193.70 km) |
| Welwyn Garden City to Pavlikeni | 1,319.99 mi (2,124.32 km) |
| Welwyn Garden City to Pazardzhik | 1,323.33 mi (2,129.69 km) |
| Welwyn Garden City to Pernik | 1,254.21 mi (2,018.46 km) |
| Welwyn Garden City to Peshtera | 1,329.20 mi (2,139.14 km) |
| Welwyn Garden City to Petrich | 1,314.36 mi (2,115.26 km) |
| Welwyn Garden City to Pleven | 1,284.67 mi (2,067.48 km) |
| Welwyn Garden City to Plovdiv | 1,342.19 mi (2,160.04 km) |
| Welwyn Garden City to Pomorie | 1,441.50 mi (2,319.86 km) |
