There are several airlines that operate frequent flights from Washington D.C. (DCA) to Houston (IAH) including

• American Airlines with 541 flights a week
• United Airlines with 201 flights a week
• Delta Air Lines with 185 flights a week
• Alaska Airlines with 29 flights a week
• Qantas Airways with 26 flights a week

The earliest flight leaves Ronald Reagan Washington National Airport at 05:45 and arrives at George Bush Intercontinental Airport at 07:48. The last flight of the day departs Washington D.C. at 19:45 and arrives at Houston at 22:09.

The flight distance from Washington D.C. to Houston is about 1950 km, the shortest flight is 03 hours 03 minutes with United Airlines."

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