| Portsmouth to Niederzier | 329.46 mi (530.21 km) |
| Portsmouth to Niefern-Oschelbronn | 458.24 mi (737.47 km) |
| Portsmouth to Nierstein | 420.33 mi (676.46 km) |
| Portsmouth to Niesky | 690.23 mi (1,110.82 km) |
| Portsmouth to Nittenau | 602.46 mi (969.56 km) |
| Portsmouth to Nittendorf | 592.47 mi (953.49 km) |
| Portsmouth to Nohfelden | 373.42 mi (600.96 km) |
| Portsmouth to Norden | 400.28 mi (644.19 km) |
| Portsmouth to Nordenham | 445.28 mi (716.60 km) |
| Portsmouth to Norderstedt | 509.66 mi (820.22 km) |
| Portsmouth to Nordhausen | 516.44 mi (831.14 km) |
| Portsmouth to Nordhorn | 367.20 mi (590.96 km) |
| Portsmouth to Nordkirchen | 377.60 mi (607.69 km) |
| Portsmouth to Nordlingen | 532.69 mi (857.28 km) |
| Portsmouth to Nordstemmen | 476.55 mi (766.93 km) |
