| Houston to Yverdon-les-Bains | 5,266.57 mi (8,475.72 km) |
| Houston to Zofingen | 5,302.43 mi (8,533.43 km) |
| Houston to Zollikon | 5,326.55 mi (8,572.26 km) |
| Houston to Zuchwil | 5,289.87 mi (8,513.22 km) |
| Houston to Zug | 5,330.12 mi (8,578.00 km) |
| Houston to Zurich | 5,323.93 mi (8,568.04 km) |
| Houston to Ra's al `Ayn | 7,003.71 mi (11,271.38 km) |
| Houston to Tall Abyad | 6,973.31 mi (11,222.46 km) |
| Houston to Acarlar | 6,496.47 mi (10,455.06 km) |
| Houston to Acigol | 6,717.92 mi (10,811.44 km) |
| Houston to Acipayam | 6,578.71 mi (10,587.41 km) |
| Houston to Adakli | 6,887.95 mi (11,085.08 km) |
| Houston to Adana | 6,826.94 mi (10,986.90 km) |
| Houston to Adilcevaz | 6,984.68 mi (11,240.76 km) |
| Houston to Adiyaman | 6,892.67 mi (11,092.67 km) |
