| Houston to Zottegem | 5,021.06 mi (8,080.62 km) |
| Houston to Zulte | 5,005.19 mi (8,055.07 km) |
| Houston to Zwevegem | 5,004.78 mi (8,054.42 km) |
| Houston to Zwijndrecht | 5,031.11 mi (8,096.80 km) |
| Houston to Asenovgrad | 6,188.22 mi (9,958.97 km) |
| Houston to Aytos | 6,246.57 mi (10,052.89 km) |
| Houston to Balchik | 6,245.56 mi (10,051.25 km) |
| Houston to Bankya | 6,090.40 mi (9,801.55 km) |
| Houston to Bansko | 6,142.82 mi (9,885.91 km) |
| Houston to Berkovitsa | 6,065.94 mi (9,762.19 km) |
| Houston to Blagoevgrad | 6,119.43 mi (9,848.27 km) |
| Houston to Botevgrad | 6,106.56 mi (9,827.55 km) |
| Houston to Burgas | 6,264.05 mi (10,081.02 km) |
| Houston to Byala Slatina | 6,086.65 mi (9,795.52 km) |
| Houston to Chirpan | 6,197.37 mi (9,973.70 km) |
