Alaska AirlinesAS
live
Direct flights from Seattle (SEA) to Houston (IAH): 56 nonstop departures observed each week across 2 airlines. 75% of the last 8 tracked flights arrived within 15 minutes of schedule. The median arrival is on schedule. 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 Seattle and Houston. Updated 31 October 2026 at 10:23 UTC.
Today, SEA → IAH
Sat 31 Oct · local times- 07:05 UA2135United On scheduleGate B11 IAH 13:21scheduled
- 10:10 UA3911United On schedule IAH 16:26scheduled
- 13:58 UA434United On scheduleGate B7A IAH 20:19scheduled
- 17:35 AS240Alaska Sched 17:35Departure not confirmed by the board IAH est. 23:45sched 23:59
- 23:59 UA2767United Sched 23:59Departure not confirmed by the board ·
Checked SEA board 03:22 · IAH board 05:23
SEA
Seattle
smooth · +3
IAH
Houston
smooth · +0
3,013 km · ~4h 22m est.
Runs mixed · 2 airlines · 56x weekly · nonstop
75% on time
of the last 8 tracked SEA → IAH flights arrived within 15 minutes
Median arrival delay is −1 min. 0 of 8 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−1 minacross the last 8 arrivals
Flight time~4h 22mestimated from route distance
Weekly departures56x2 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 SEA and IAH: a 33% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +4 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 Seattle to Houston route actually runs
Pro Flight Search records official board updates for nonstop SEA to IAH 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: Seattle (SEA) to Houston (IAH) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SEA-IAH
SEA to IAH questions
Is SEA–IAH running on time right now?
Smooth skies ahead. The departure side at SEA is the weaker end, route health score 82/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on SEA–IAH?
Operators schedule morning departures around 10:47 and evening departures around 17:05 from SEA. Earlier flights typically land before destination-airport delays accumulate later in the day; check the IAH delay card to confirm conditions when you'd arrive.
How long is the flight from SEA to IAH?
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 SEA–IAH fly?
2 carriers operate this route, around 56 flights a week between them. Compare carrier days and times in the airline list above.
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