| South Portland to Zambrow | 3,999.38 mi (6,436.38 km) |
| South Portland to Zamosc | 4,119.17 mi (6,629.16 km) |
| South Portland to Zary | 3,784.25 mi (6,090.16 km) |
| South Portland to Zawiercie | 3,984.63 mi (6,412.64 km) |
| South Portland to Zdunska Wola | 3,929.09 mi (6,323.25 km) |
| South Portland to Zdzieszowice | 3,938.59 mi (6,338.55 km) |
| South Portland to Zgierz | 3,937.02 mi (6,336.01 km) |
| South Portland to Zgorzelec | 3,795.21 mi (6,107.80 km) |
| South Portland to Ziebice | 3,890.86 mi (6,261.73 km) |
| South Portland to Zielona Gora | 3,788.37 mi (6,096.79 km) |
| South Portland to Zielonka | 3,984.71 mi (6,412.77 km) |
| South Portland to Zlocieniec | 3,756.28 mi (6,045.14 km) |
| South Portland to Zlotoryja | 3,830.38 mi (6,164.40 km) |
| South Portland to Zlotow | 3,799.11 mi (6,114.08 km) |
| South Portland to Znin | 3,839.93 mi (6,179.76 km) |
