There are several airlines that operate frequent flights from Houston (IAH) to Bangkok (BKK) including

• United Airlines with 51 flights a week
• Lufthansa Cargo with 30 flights a week
• American Airlines with 23 flights a week
• Brussels Airlines with 21 flights a week
• All Nippon Airways with 17 flights a week

The earliest flight leaves George Bush Intercontinental Airport at 00:05 and arrives at Suvarnabhumi Intl. Airport at 00:10. The last flight of the day departs Houston at 23:40 and arrives at Bangkok at 23:50.

The flight distance from Houston to Bangkok is about 16926 km, the shortest flight is 20 hours 45 minutes with United Airlines."

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