About 1 in 6 DL 3789 flights from Seattle arrived 15+ minutes late, diverted or cancelled over the past year (16%); 0.0% were cancelled. The typical flight landed 7 minutes early.
DL 3789: SEA → SJC
Scheduled to leave Seattle at 11:45 a.m. local time, operated by SkyWest as OO 3789. Over the past year it arrived on time 84% of the time (345 flights), in line with other DL flights on the route at that hour (83%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 51 | 80% |
| Tuesday | 50 | 84% |
| Wednesday | 50 | 90% |
| Thursday | 50 | 82% |
| Friday | 50 | 82% |
| Saturday | 45 | 82% |
| Sunday | 49 | 88% |
Why it was late
All flights SEA → SJC · Connecting off DL 3789? Check the risk
DL 3789: SJC → SEA
Scheduled to leave San Jose at 2:51 p.m. local time, operated by SkyWest as OO 3789. Over the past year it arrived on time 82% of the time (192 flights), in line with other DL flights on the route at that hour (80%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 30 | 77% |
| Tuesday | 28 | 86% |
| Wednesday | 28 | 82% |
| Thursday | 28 | 86% |
| Friday | 28 | 86% |
| Saturday | 23 | 83% |
| Sunday | 27 | 74% |
Why it was late
All flights SJC → SEA · Connecting off DL 3789? Check the risk
Questions
How often is DL 3789 from SEA to SJC late?
Delta Air Lines 3789 from Seattle, WA to San Jose, CA arrived 15 or more minutes late, was diverted or was cancelled on 16% of 345 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
How often is DL 3789 from SJC to SEA late?
Delta Air Lines 3789 from San Jose, CA to Seattle, WA arrived 15 or more minutes late, was diverted or was cancelled on 18% of 192 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.