Delta Air Lines JFK to SEA on-time performance
Delta Air Lines nonstop flights from New York to Seattle · Aug 2025 – Jul 2026
On-time arrivals
73%
arrived < 15 min late
Cancelled
3.1%
41 flights
Avg arrival delay
17 min
58 min when late
Rank on route
#1 of 3
route average 70% on time
Key facts
- Delta Air Lines flights on JFK to SEA arrived on time 73% of the time in Aug 2025 – Jul 2026.
- 3.1% were cancelled, and 7% arrived an hour or more late.
- That ranks #1 of 3 airlines on this route, which averaged 70% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (42%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion42%
- Airline (crew, maintenance, cleaning, fueling)37%
- Late-arriving aircraft17%
- Extreme weather5%
- Security0%
Other airlines on JFK to SEA
- Alaska Airlines68% on time · 22 min avg delay
- JetBlue70% on time · 23 min avg delay
Full JFK to SEA comparison →
Delta Air Lines on-time record across all routes →
1,338 Delta Air Lines flights tracked on this route; 41 cancelled, 8 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.