Houston to Seattle (IAH–SEA) — Airlines, Schedules & Connections
No flights match your filters.
No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.
Most recently operated nonstop flights — the month shown is when each was last scheduled. Most destinations remain reachable with a connection.
No discontinued nonstop flights on record for this route.
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 43m. Beyond nonstop, 1-stop connecting options are also available.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| UA United Airlines Also: BR, EK | 46 | 738, 739, 7M8, B39M | 4h22-4h51 | Star Alliance | BR, EK | |
| AS Alaska Airlines Also: HA, JL, QR | 21 | 739, 73J, 7M9 | 4h38-4h43 | Oneworld | HA, JL, QR |
Weekly Schedule Pattern
Connection Landscape
On-Time Performance
Other ways to reach Seattle from Houston
| Metric | IAH→SEA | HOU→SEA | AUS→SEA |
|---|---|---|---|
| Distance from IAH | – | 24 mi | 140 mi |
| Nonstop airlines | 2 | 3 | 15 |
| Weekly flights | 115 | 16 | 161 |
| Flight time | 4h 43m | 4h 35m | 4h 18m |
| Departure OTP | 49% | – | – |
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 United Airlines and Alaska Airlines. With 115 weekly departures, this is a heavily served route.
IAH to SEA Flight Duration and Schedule
Nonstop flight time from IAH to SEA is about 4 hours 43 minutes gate to gate. The route covers a distance of 1,873 miles (3,013 km). There are approximately 115 weekly flights outbound and 110 return, totaling 225 flights per week in both directions.
Connecting Options and Alternatives
1-stop connecting options are also available, commonly via Salt Lake City, Austin Bergstrom and Denver. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Houston (HOU), Austin (AUS) and Fort Cavazos (GRK).