Alaska Airlines ATL to SEA on-time performance
Alaska Airlines nonstop flights from Atlanta to Seattle · Aug 2025 – Jul 2026
On-time arrivals
75%
arrived < 15 min late
Cancelled
1.0%
9 flights
Avg arrival delay
15 min
55 min when late
Rank on route
#2 of 2
route average 77% on time
Key facts
- Alaska Airlines flights on ATL to SEA arrived on time 75% of the time in Aug 2025 – Jul 2026.
- 1% were cancelled, and 6% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 77% on time overall.
- The largest source of delay minutes was late-arriving aircraft (37%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft37%
- Air traffic control & airport congestion30%
- Airline (crew, maintenance, cleaning, fueling)29%
- Extreme weather4%
- Security1%
Other airlines on ATL to SEA
- Delta Air Lines78% on time · 14 min avg delay
Full ATL to SEA comparison →
Alaska Airlines on-time record across all routes →
898 Alaska Airlines flights tracked on this route; 9 cancelled, 1 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.