IAH → SEAHouston to Seattle

live

Direct flights from Houston (IAH) to Seattle (SEA): 14 nonstop departures observed each week across 2 airlines. 100% of the last 6 operated flights arrived within 15 minutes of schedule. The median arrival is 5 minutes early. No cancellations were recorded across the 6 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 10 September 2026 at 03:23 UTC.

IAH Houston smooth · +0
SEA Seattle smooth · +0
3,013 km · ~4h 22m est.
dep bank 07:02–18:4514x weekly
Runs reliable · 2 airlines · 14x weekly · nonstop
100% on time

of the last 6 operated IAH → SEA flights arrived within 15 minutes

Median arrival delay is −5 min. 0 of 6 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−5 minacross the last 6 operated legs
Flight time~4h 22mestimated from route distance
Weekly departures14x2 direct airlines on the leg

The week

scheduled departures · origin local time
06121824
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 days
Alaska AirlinesAS

Flights AS241 07:02 daily · AS439 14:34 daily

History

operated legs · board outcomes
09-09AS241departed−5
09-09AS439departed−6
09-09UA2205departed−4
09-09UA2228departed−4
09-09UA2341dep −1 → arr−19
09-09UA2638departed−9

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
IAHHouston +0 min smooth 🌤 scattered clouds · SE 3 kt Full IAH delay board →
SEASeattle +0 min smooth 🌤 mostly cloudy · N 7 kt Full SEA delay board →

Weather lens

Current conditions put the pressure at IAH and SEA: 33% odds of a 15+ minute delay and around +2 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

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
https://proflightsearch.com/search-flights/IAH-SEA
How we measure this →

IAH to SEA questions

Is IAH–SEA running on time right now?

Smooth skies ahead. Both endpoints currently score the same, route health score 100/100. 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 07:02 and evening departures around 18:45 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 42 flights a week between them. Compare carrier days and times in the airline list above.