Alaska Airlines SEA to SLC on-time performance
Alaska Airlines nonstop flights from Seattle to Salt Lake City · Aug 2025 – Jul 2026
On-time arrivals
80%
arrived < 15 min late
Cancelled
1.4%
20 flights
Avg arrival delay
10 min
42 min when late
Rank on route
#2 of 4
route average 84% on time
Key facts
- Alaska Airlines flights on SEA to SLC arrived on time 80% of the time in Aug 2025 – Jul 2026.
- 1.4% were cancelled, and 4% arrived an hour or more late.
- That ranks #2 of 4 airlines on this route, which averaged 84% 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%
- Airline (crew, maintenance, cleaning, fueling)40%
- Air traffic control & airport congestion14%
- Extreme weather2%
- Security0%
Other airlines on SEA to SLC
- Delta Air Lines87% on time · 9 min avg delay
- SkyWest Airlines80% on time · 10 min avg delay
- Frontier Airlines74% on time · 16 min avg delay
Full SEA to SLC comparison →
Alaska Airlines on-time record across all routes →
1,420 Alaska Airlines flights tracked on this route; 20 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.