Alaska Airlines SEA to DCA on-time performance
Alaska Airlines nonstop flights from Seattle to Washington · Aug 2025 – Jul 2026
On-time arrivals
77%
arrived < 15 min late
Cancelled
0.8%
6 flights
Avg arrival delay
13 min
53 min when late
Rank on route
#2 of 2
route average 82% on time
Key facts
- Alaska Airlines flights on SEA to DCA arrived on time 77% of the time in Aug 2025 – Jul 2026.
- 0.8% were cancelled, and 7% 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 air traffic control & airport congestion (53%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion53%
- Airline (crew, maintenance, cleaning, fueling)21%
- Late-arriving aircraft15%
- Extreme weather12%
- Security0%
Other airlines on SEA to DCA
- Delta Air Lines92% on time · 11 min avg delay
Full SEA to DCA comparison →
Alaska Airlines on-time record across all routes →
728 Alaska Airlines flights tracked on this route; 6 cancelled, 10 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.