Flights Houston → Seattle
IAH → SEA
Route overview
The flight route from Houston to Seattle operates with an average on-time performance of 81%, with flights typically experiencing a mean delay of 9.5 minutes. Over the course of a year, this route sees approximately 406 flights using various aircraft models including Airbus A319, Airbus A320, Boeing 737-900, and Boeing 737-800, serving a destination airport that handles nearly 52.7 million passengers annually.
Your rights on this US flight (DOT)
US flights have no statutory cash compensation for delays. Under the US DOT rules, if your flight is cancelled or significantly changed and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Amenities for controllable delays depend on each airline's contract of carriage.
US flight refund rules & checker →General information, not legal advice.
The Houston (IAH) → Seattle (SEA) route is operated by Alaska Airlines, Delta Air Lines, United Airlines. Across 546 flights monitored in recent months, 77% arrived on time (within 15 min of schedule), with an average delay of 11 minutes. The cancellation rate is 4.03%. FlightGuard's average computed risk is 22.8/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Seattle the average ATFM delay is 2.0 minutes (main cause: atfm). Departing from Houston the average ATFM delay is 2.0 minutes.
Heading to Seattle: what to expect in this direction
Flying from Houston (IAH) to Seattle (SEA) heads north-west for about 3,013 km, a flight time of roughly 4h 11m.
Departures from Houston on this leg cluster in the overnight window: about 44% of IAH-SEA flights take off then.
Air-traffic congestion: departing Houston the average ATFM delay is 2.0 min (atfm); arriving into Seattle it is 2.0 min (atfm).
Across 546 tracked IAH-SEA flights, 77% left on time with an average delay of 11 min and a 4.0% cancellation rate.
Route facts
Flights on this route
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| Delta Air Lines (DL) | 80% | 8 min | 1.8% |
| United Airlines (UA) | 74% | 10 min | 6.9% |
| Alaska Airlines (AS) | 67% | 10 min | 11.9% |
Airlines operating IAH-SEA
Airports
Frequently asked questions about IAH-SEA
On the Houston (IAH) -> Seattle (SEA) route, on-time performance is 77% with an average delay of 11 minutes, based on 546 tracked flights.
The cancellation rate on Houston-Seattle is 4.03% across 546 monitored flights.
The route is operated by 3 airlines: Alaska Airlines, Delta Air Lines, United Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at Seattle, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
US flights have no statutory cash compensation for delays. Under US DOT rules, if the airline cancels or significantly changes your flight and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Meals or hotels for controllable delays depend on each airline's contract of carriage.
