Direct (nonstop) flights from Seattle to Houston
2 airlines fly nonstop from Seattle Tacoma International (SEA) to George Bush Intcntl Houston (IAH). It's 1,873 miles (3,015 km), about 4h 23m in the air. Operated by Alaska Airlines, United Airlines.
Alaska Airlines
United Airlines
Route data last updated: May 28, 2026
Airlines with non-stop flights
AS
Alaska Airlines
UA
United Airlines
Alternative Routes
Other ways to fly from Seattle to Houston with one stop · direct emits 317 kg CO₂ per passenger
Looking for the return flight?
IAH → SEA: Flights from Houston to SeattleOther direct flights from Seattle
Direct flights from Houston (IAH)
Frequently Asked Questions
How long is the direct flight from Seattle to Houston?
A nonstop flight from Seattle (SEA) to Houston (IAH) takes approximately 4 hours and 23 minutes. The distance is 1,873 miles (3,015 km).
Which airlines fly nonstop from Seattle to Houston?
2 airlines: Alaska Airlines, United Airlines.
Is there a nonstop flight from Seattle to Houston?
Yes. 2 airlines: Alaska Airlines, United Airlines.
How far is Seattle from Houston?
The flight distance from Seattle to Houston is 1,873 miles (3,015 km), measured as the great-circle (shortest air) distance.
What type of aircraft flies from Seattle to Houston?
At 4h 23m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.
What is the carbon footprint of a flight from Seattle to Houston?
Roughly 317 kg CO2 per passenger one-way. That's about the same as driving 1,585 km.
Is the return flight from Houston to Seattle also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Seattle to Houston?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at Seattle Tacoma International for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.