Great-circle route IAH → SEA. Faint dots are other airports, for geographic context. Download this map — free to reuse with a link back to this page.
The flight time from Houston to Seattle is approximately 4h 13m nonstop. The distance is 1,872 miles (3,013 km). There are about 9 nonstop flights from Houston to Seattle per day.
That is a great-circle estimate, not a scheduled block time. An airline's published time will differ by roughly 15 to 45 minutes depending on routing, winds and taxi.
| Route | Est. time | Distance | Frequency | Airlines |
|---|---|---|---|---|
| IAH → SEA George Bush Intercontinental Houston Airport to Seattle Tacoma International Airport |
4h 13m | 1,872 mi | 53/wk | Alaska Airlines, United Airlines |
| HOU → SEA William P Hobby Airport to Seattle Tacoma International Airport |
4h 15m | 1,892 mi | 7/wk | Southwest Airlines |
Frequencies come from our most recent schedule sample. Where a pairing shows “—” we track it as an operating nonstop but hold no schedule sample for it — we would rather show nothing than guess.
3 airlines fly nonstop from Houston to Seattle, including Alaska Airlines, Southwest Airlines, United Airlines.
Recent scheduled departures on this route have used the Boeing 737, Boeing 737-900, Boeing 737-800, Airbus A320.
Aircraft assignments change by season and by time of day.
On a long east–west route like this one the two directions do not take the same time. Aircraft flying eastbound ride the mid-latitude jet stream and typically arrive earlier than the westbound leg, which flies into it. The difference is commonly 30 to 90 minutes on transatlantic and transpacific flights, and it varies by season. The estimate above does not model wind — treat it as a midpoint and check the airline's own timetable for the block time on your date.
The distance from Houston to Seattle is 1,872 miles, or 3,013 kilometres.
| Great-circle distance | 1,872 mi |
| Kilometres | 3,013 km |
| Nautical miles | 1,627 nmi |
Measured airport to airport. The actual track is longer — aircraft follow airways, avoid restricted airspace and route around weather.
Yes. 3 airlines fly it nonstop, with about 60 departures a week, across 2 airport pairings. The route is in our live nonstop dataset, last seeded 2026-07-07.
About 4h 13m in the air on the IAH–SEA nonstop. That is a great-circle estimate from the 1,872-mile distance, not a scheduled block time — an airline's published time will differ by roughly 15 to 45 minutes depending on routing, winds and taxi.
1,872 miles (3,013 km) great-circle between George Bush Intercontinental Houston Airport and Seattle Tacoma International Airport.
Alaska Airlines, Southwest Airlines, United Airlines.
Recent scheduled departures have used the Boeing 737, Boeing 737-900, Boeing 737-800, Airbus A320. Assignments change by season and by time of day.
IAH to SEA, HOU to SEA. Flight times differ slightly between them because the airports are not in the same place.
