Delta Air Lines JFK to SJU on-time performance
Delta Air Lines nonstop flights from New York to San Juan · Aug 2025 – Jul 2026
On-time arrivals
77%
arrived < 15 min late
Cancelled
2.3%
25 flights
Avg arrival delay
14 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 SJU arrived on time 77% of the time in Aug 2025 – Jul 2026.
- 2.3% 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 airline (crew, maintenance, cleaning, fueling) (41%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)41%
- Air traffic control & airport congestion36%
- Late-arriving aircraft19%
- Extreme weather3%
- Security1%
Other airlines on JFK to SJU
- JetBlue68% on time · 26 min avg delay
- Frontier Airlines56% on time · 49 min avg delay
Full JFK to SJU comparison →
Delta Air Lines on-time record across all routes →
1,104 Delta Air Lines flights tracked on this route; 25 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.