Delta Air Lines DCA to SEA on-time performance
Delta Air Lines nonstop flights from Washington to Seattle · Aug 2025 – Jul 2026
On-time arrivals
68%
arrived < 15 min late
Cancelled
2.7%
10 flights
Avg arrival delay
32 min
94 min when late
Rank on route
#2 of 2
route average 74% on time
Key facts
- Delta Air Lines flights on DCA to SEA arrived on time 68% of the time in Aug 2025 – Jul 2026.
- 2.7% were cancelled, and 13% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 74% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (37%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)37%
- Late-arriving aircraft29%
- Air traffic control & airport congestion28%
- Extreme weather6%
- Security0%
Other airlines on DCA to SEA
- Alaska Airlines78% on time · 12 min avg delay
Full DCA to SEA comparison →
Delta Air Lines on-time record across all routes →
364 Delta Air Lines flights tracked on this route; 10 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.