There are several airlines that operate frequent flights from Houston (IAH) to Seattle (SEA) including

• United Airlines with 500 flights a week
• American Airlines with 116 flights a week
• Delta Air Lines with 111 flights a week
• Alaska Airlines with 34 flights a week
• with 21 flights a week

The earliest flight leaves George Bush Intercontinental Airport at 06:08 and arrives at Seattle Tacoma Intl. Airport at 00:03. The last flight of the day departs Houston at 21:50 and arrives at Seattle at 23:43.

The flight distance from Houston to Seattle is about 3030 km, the shortest flight is 04 hours 28 minutes with United Airlines."

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