Alaska Airlines SLC to SEA on-time performance
Alaska Airlines nonstop flights from Salt Lake City to Seattle · Aug 2025 – Jul 2026
On-time arrivals
77%
arrived < 15 min late
Cancelled
1.6%
22 flights
Avg arrival delay
12 min
47 min when late
Rank on route
#2 of 4
route average 80% on time
Key facts
- Alaska Airlines flights on SLC to SEA arrived on time 77% of the time in Aug 2025 – Jul 2026.
- 1.6% were cancelled, and 4% arrived an hour or more late.
- That ranks #2 of 4 airlines on this route, which averaged 80% on time overall.
- The largest source of delay minutes was late-arriving aircraft (44%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft44%
- Air traffic control & airport congestion30%
- Airline (crew, maintenance, cleaning, fueling)19%
- Extreme weather6%
- Security0%
Other airlines on SLC to SEA
- Delta Air Lines83% on time · 10 min avg delay
- SkyWest Airlines77% on time · 18 min avg delay
- Frontier Airlines68% on time · 21 min avg delay
Full SLC to SEA comparison →
Alaska Airlines on-time record across all routes →
1,417 Alaska Airlines flights tracked on this route; 22 cancelled, 0 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.