Houston to Seattle (IAH–SEA) — Airlines, Schedules & Connections
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No nonstop flights on this route. connecting options below.
IAH–SEA is served by 2 airlines with nonstop service. United Airlines and Alaska Airlines lead the route. The flight covers 1,873 miles in approximately 4h 27m. Beyond nonstop, 112 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| UA United Airlines Also: BR, EK | 34 | 320, 738, 739, 7M9 | 4h27-4h57 | Star Alliance | BR, EK | |
| AS Alaska Airlines Also: HA, JL, QR | 21 | 739, 73J | 4h49-5h02 | Oneworld | HA, JL, QR |
Weekly Schedule Pattern
Connection Landscape
Other ways to reach Seattle from Houston
| Metric | IAH→SEA | HOU→SEA | AUS→SEA |
|---|---|---|---|
| Distance from IAH | – | 24 mi | 140 mi |
| Nonstop airlines | 2 | 1 | 10 |
| Weekly flights | 90 | – | 115 |
| Flight time | 4h 27m | 3h 17m | 3h 48m |
| Departure OTP | 51% | – | – |
Travel Essentials
IAH: CDT · SEA: PDT
When it's 6:00 PM in Houston, it's 4:00 PM in Seattle.
IAH has no direct rail link to downtown Houston. The IAH Express bus runs from Houston Amtrak/Greyhound station via Park & Ride to Terminal C (60–90 min, $1.25 with METRO Q card). This is the only transit option; Houston's rail network does not reach the airport.Taxis from downtown Houston cost $50–70 and take 40–60 minutes. Ride-hails (Uber, Lyft) are typically $35–55. IAH sits 23 miles north of downtown on the North Freeway (I-45); traffic is heavy during morning and evening rush. Remote economy parking lots serve all terminals via shuttle.
Link Light Rail from the airport station (inside the terminal) to downtown Seattle takes 38 minutes ($3.50). No transfers needed; trains run 5am to 1am daily.Taxis and ride-shares to downtown cost $35–55. For Bellevue and Eastside destinations (across Lake Washington), ride-share is faster than Link. Car rentals are in the consolidated rental facility; take the free shuttle from baggage claim. Sound Transit buses serve Tacoma, Renton, and Federal Way.
Marine west coast climate. Winters are mild but persistently grey and rainy (3–9°C). Snow is rare at sea level but can occur December through February, causing significant disruptions when it does. The airport sits between Seattle and Tacoma in an area that receives more fog and low cloud than downtown Seattle.
Summers are famously pleasant (18–25°C) with low humidity and mostly clear skies, one of the best flying climates in the US from June through September. The wettest months are November through January.
IAH–SEA Quick Facts
Frequently Asked Questions
Flights from IAH to SEA
George Bush Intercontinental Airport (IAH) and Seattle–Tacoma International Airport (SEA) are connected by nonstop service from Alaska Airlines and United Airlines. With 90 weekly departures, this is a heavily served route.
IAH to SEA Flight Duration and Schedule
Nonstop flight time from IAH to SEA ranges from 4 hours 27 minutes to 5 hours 2 minutes. The route covers a distance of 1,873 miles (3,013 km). There are approximately 90 weekly flights outbound and 84 return, totaling 174 flights per week in both directions.
Connecting Options and Alternatives
112 one-stop connections are available, with the fastest taking approximately 3 hours via FTW. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Houston (HOU) and Austin (AUS).