Alaska AirlinesAS
live
Direct flights from Houston (IAH) to Seattle (SEA): 35 nonstop departures observed each week across 2 airlines. No cancellations were recorded across the 8 tracked flights. The nonstop covers 3,013 km, an estimated 4 hours 22 minutes in the air. Measured by Pro Flight Search from live flight boards at Houston and Seattle. Updated 1 November 2026 at 10:23 UTC.
Today, IAH → SEA
Sun 1 Nov · local times- 07:02 AS280Alaska On scheduleGate A3G · TA SEA est. 09:42sched 09:53
- 10:20 UA1062United On scheduleGate D4B · TC SEA 13:25scheduled
- 14:27 AS439Alaska On scheduleGate A3G · TA SEA 17:18scheduled
- 16:25 UA2638United On scheduleGate C35 · TC SEA 19:17scheduled
- 19:57 UA2341United Sched 19:57Departure not confirmed by the board SEA 22:53scheduled
Checked IAH board 04:23 · SEA board 02:22
IAH
Houston
heavy · +58
SEA
Seattle
smooth · +0
3,013 km · ~4h 22m est.
Under pressure · 2 airlines · 35x weekly · nonstop
61 / 100
route health from live IAH and SEA delay boards
0 of 8 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Flight time~4h 22mestimated from route distance
Weekly departures35x2 direct airlines on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska AirlinesUnited Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Conditions are tightest at IAH and SEA: a 24% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +-2 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →
next sweep in 120s
How the Houston to Seattle route actually runs
Pro Flight Search records official board updates for nonstop IAH to SEA flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search: Houston (IAH) to Seattle (SEA) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/IAH-SEA
IAH to SEA questions
Is IAH–SEA running on time right now?
Some delays possible. The departure side at IAH is the weaker end, route health score 61/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on IAH–SEA?
Operators schedule morning departures around 06:02 from IAH. Earlier flights typically land before destination-airport delays accumulate later in the day; check the SEA delay card to confirm conditions when you'd arrive.
How long is the flight from IAH to SEA?
Great-circle distance is 3,013 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 243–288 min gate-to-gate on this route.
How often does IAH–SEA fly?
2 carriers operate this route, around 35 flights a week between them. Compare carrier days and times in the airline list above.
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