| Northolt to Montana | 1,229.37 mi (1,978.48 km) |
| Northolt to Nova Zagora | 1,380.98 mi (2,222.47 km) |
| Northolt to Novi Iskar | 1,259.37 mi (2,026.77 km) |
| Northolt to Novi Pazar | 1,396.36 mi (2,247.23 km) |
| Northolt to Omurtag | 1,373.36 mi (2,210.20 km) |
| Northolt to Panagyurishte | 1,305.67 mi (2,101.27 km) |
| Northolt to Parvomay | 1,364.44 mi (2,195.86 km) |
| Northolt to Pavlikeni | 1,322.31 mi (2,128.06 km) |
| Northolt to Pazardzhik | 1,324.34 mi (2,131.32 km) |
| Northolt to Pernik | 1,254.93 mi (2,019.62 km) |
| Northolt to Peshtera | 1,330.06 mi (2,140.53 km) |
| Northolt to Petrich | 1,314.18 mi (2,114.96 km) |
| Northolt to Pleven | 1,286.83 mi (2,070.96 km) |
| Northolt to Plovdiv | 1,343.35 mi (2,161.92 km) |
| Northolt to Pomorie | 1,444.23 mi (2,324.27 km) |
