Delta Air Lines DTW to SJU on-time performance
Delta Air Lines nonstop flights from Detroit to San Juan · Aug 2025 – Jul 2026
On-time arrivals
76%
arrived < 15 min late
Cancelled
0.9%
3 flights
Avg arrival delay
13 min
47 min when late
Rank on route
#2 of 2
route average 76% on time
Key facts
- Delta Air Lines flights on DTW to SJU arrived on time 76% of the time in Aug 2025 – Jul 2026.
- 0.9% were cancelled, and 4% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 76% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (46%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion46%
- Airline (crew, maintenance, cleaning, fueling)45%
- Late-arriving aircraft5%
- Extreme weather4%
- Security0%
Other airlines on DTW to SJU
- Spirit Airlines79% on time · 13 min avg delay
Full DTW to SJU comparison →
Delta Air Lines on-time record across all routes →
324 Delta Air Lines flights tracked on this route; 3 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.