Delta Air Lines BOS to SAN on-time performance
Delta Air Lines nonstop flights from Boston to San Diego · Aug 2025 – Jul 2026
On-time arrivals
68%
arrived < 15 min late
Cancelled
1.6%
6 flights
Avg arrival delay
15 min
42 min when late
Rank on route
#3 of 4
route average 77% on time
Key facts
- Delta Air Lines flights on BOS to SAN arrived on time 68% of the time in Aug 2025 – Jul 2026.
- 1.6% were cancelled, and 7% arrived an hour or more late.
- That ranks #3 of 4 airlines on this route, which averaged 77% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (43%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion43%
- Late-arriving aircraft32%
- Airline (crew, maintenance, cleaning, fueling)24%
- Extreme weather0%
- Security0%
Other airlines on BOS to SAN
- JetBlue84% on time · 11 min avg delay
- Alaska Airlines73% on time · 19 min avg delay
- Southwest Airlines43% on time · 41 min avg delay
Full BOS to SAN comparison →
Delta Air Lines on-time record across all routes →
364 Delta Air Lines flights tracked on this route; 6 cancelled, 6 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.