Alaska Airlines Flight 729 Deals & Information (2026/2027)

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Frequently asked questions

What route does flight number AS729 take?
You'll be landing at SEA from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) if you're traveling on flight number AS729. You'll be in the air for 4 hours and 20 minutes during this trip. It's also worthwhile noting that it conveniently operates non-stop.
What terminal does AS729 fly out of?
Flight number AS729 runs between STL and Seattle, WA Airport (SEA-Seattle - Tacoma Intl.), and those taking this flight typically take off from Terminal 1.
What kind of plane is on flight number AS729?
The Boeing 737-900 is the type of plane most commonly used for flight AS729. Usually, this flight departs from Lambert Field and touches down at Seattle, WA Airport (SEA-Seattle - Tacoma Intl.).
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your AS729 flight with Travelocity, please visit our Customer Service Portal.