Direct (nonstop) flights from Houston to Seattle
2 airlines fly nonstop from George Bush Intcntl Houston (IAH) to Seattle Tacoma International (SEA). It's 1,873 miles (3,015 km), about 4h 57m 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 Houston to Seattle with one stop · direct emits 317 kg CO₂ per passenger
Looking for the return flight?
SEA → IAH: Flights from Seattle to HoustonOther direct flights from Houston
Direct flights from Seattle (SEA)
Frequently Asked Questions
How long is the direct flight from Houston to Seattle?
A nonstop flight from Houston (IAH) to Seattle (SEA) takes approximately 4 hours and 57 minutes. The distance is 1,873 miles (3,015 km).
Which airlines fly nonstop from Houston to Seattle?
2 airlines: Alaska Airlines, United Airlines.
Is there a nonstop flight from Houston to Seattle?
Yes. 2 airlines: Alaska Airlines, United Airlines.
How far is Houston from Seattle?
The flight distance from Houston to Seattle is 1,873 miles (3,015 km), measured as the great-circle (shortest air) distance.
What type of aircraft flies from Houston to Seattle?
At 4h 57m, 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 Houston to Seattle?
Roughly 317 kg CO2 per passenger one-way. That's about the same as driving 1,585 km.
Is the return flight from Seattle to Houston 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 Houston to Seattle?
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 George Bush Intcntl Houston for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.