| Houston to Yuncos | 5,002.93 mi (8,051.44 km) |
| Houston to Zafra | 4,925.24 mi (7,926.41 km) |
| Houston to Zamora | 4,873.00 mi (7,842.33 km) |
| Houston to Zaragoza | 5,098.23 mi (8,204.81 km) |
| Houston to Zarautz | 4,991.11 mi (8,032.42 km) |
| Houston to Zuera | 5,096.09 mi (8,201.36 km) |
| Houston to Zumaia | 4,986.59 mi (8,025.14 km) |
| Houston to Zumarraga | 4,989.97 mi (8,030.59 km) |
| Houston to Longyearbyen | 4,490.64 mi (7,226.98 km) |
| Houston to Ahus | 5,227.48 mi (8,412.81 km) |
| Houston to Akersberga | 5,214.45 mi (8,391.85 km) |
| Houston to Alingsas | 5,098.40 mi (8,205.08 km) |
| Houston to Almhult | 5,199.19 mi (8,367.29 km) |
| Houston to Alta | 5,220.27 mi (8,401.22 km) |
| Houston to Amal | 5,064.18 mi (8,150.01 km) |
