About 1 in 9 DL 3842 flights from Los Angeles arrived 15+ minutes late, diverted or cancelled over the past year (11%); 0.0% were cancelled. The typical flight landed 14 minutes early.
DL 3842: LAX → SJC
Scheduled to leave Los Angeles at 12:57 p.m. local time, operated by SkyWest as OO 3842. Over the past year it arrived on time 89% of the time (239 flights), worse than other DL flights on the route at that hour (93%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 35 | 83% |
| Tuesday | 34 | 94% |
| Wednesday | 34 | 88% |
| Thursday | 34 | 82% |
| Friday | 34 | 94% |
| Saturday | 34 | 94% |
| Sunday | 34 | 85% |
Why it was late
All flights LAX → SJC · Connecting off DL 3842? Check the risk
DL 3842: SJC → LAX
Scheduled to leave San Jose at 2:59 p.m. local time, operated by SkyWest as OO 3842. Over the past year it arrived on time 91% of the time (203 flights), in line with other DL flights on the route at that hour (90%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 30 | 80% |
| Tuesday | 29 | 100% |
| Wednesday | 29 | 86% |
| Thursday | 29 | 90% |
| Friday | 29 | 97% |
| Saturday | 29 | 93% |
| Sunday | 28 | 89% |
Why it was late
All flights SJC → LAX · Connecting off DL 3842? Check the risk
Questions
How often is DL 3842 from LAX to SJC late?
Delta Air Lines 3842 from Los Angeles, CA to San Jose, CA arrived 15 or more minutes late, was diverted or was cancelled on 11% of 239 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
How often is DL 3842 from SJC to LAX late?
Delta Air Lines 3842 from San Jose, CA to Los Angeles, CA arrived 15 or more minutes late, was diverted or was cancelled on 9% of 203 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Delta Air Lines for today's flight. Method.