Alaska Airlines SEA to IAH on-time performance
Alaska Airlines nonstop flights from Seattle to Houston · Aug 2025 – Jul 2026
On-time arrivals
76%
arrived < 15 min late
Cancelled
0.6%
5 flights
Avg arrival delay
12 min
46 min when late
Rank on route
#2 of 2
route average 82% on time
Key facts
- Alaska Airlines flights on SEA to IAH arrived on time 76% of the time in Aug 2025 – Jul 2026.
- 0.6% were cancelled, and 4% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 82% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (41%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)41%
- Air traffic control & airport congestion30%
- Late-arriving aircraft26%
- Extreme weather3%
- Security1%
Other airlines on SEA to IAH
- United Airlines86% on time · 11 min avg delay
Full SEA to IAH comparison →
Alaska Airlines on-time record across all routes →
852 Alaska Airlines flights tracked on this route; 5 cancelled, 2 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.