SEA → IAHSeattle to Houston

live

Direct flights from Seattle (SEA) to Houston (IAH): 14 nonstop departures observed each week across 2 airlines. The median arrival is 17 minutes early. No cancellations were recorded across the 3 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 9 September 2026 at 19:06 UTC.

SEA Seattle smooth · +9
IAH Houston smooth · +0
3,013 km · ~4h 22m est.
dep bank 07:00–23:5914x weekly
Running clean · 2 airlines · 14x weekly · nonstop
93 / 100

route health from live SEA and IAH delay boards

Median arrival delay is −17 min. 0 of 3 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−17 minacross the last 3 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 AS438 10:48 daily · AS240 17:34 daily

History

operated legs · board outcomes
09-09AS438arrived−23
09-09UA2135arrived+29
09-09UA2379arrived−17

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
SEASeattle +9 min smooth 🌤 scattered clouds · 6 kt Full SEA delay board →
IAHHouston +0 min smooth 🌤 mostly cloudy · NNE 4 kt Full IAH delay board →

Weather lens

Current conditions put the pressure at SEA and IAH: 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 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
https://proflightsearch.com/search-flights/SEA-IAH
How we measure this →

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 93/100. 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 07:00 and evening departures around 17:15 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 42 flights a week between them. Compare carrier days and times in the airline list above.