About 1 in 11 DL 4125 flights from Seattle arrived 15+ minutes late, diverted or cancelled over the past year (9%); 0.0% were cancelled. The typical flight landed 10 minutes early.
DL 4125: SEA → SMF
Scheduled to leave Seattle at 12:20 p.m. local time, operated by SkyWest as OO 4125. Over the past year it arrived on time 91% of the time (349 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 | 51 | 90% |
| Tuesday | 50 | 96% |
| Wednesday | 50 | 94% |
| Thursday | 50 | 84% |
| Friday | 50 | 90% |
| Saturday | 49 | 92% |
| Sunday | 49 | 88% |
Why it was late
All flights SEA → SMF · Connecting off DL 4125? Check the risk
DL 4125: SMF → SEA
Scheduled to leave Sacramento at 1:00 p.m. local time, operated by SkyWest as OO 4125. Over the past year it arrived on time 94% of the time (177 flights), in line with 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 | 26 | 92% |
| Tuesday | 25 | 96% |
| Wednesday | 25 | 88% |
| Thursday | 25 | 92% |
| Friday | 25 | 96% |
| Saturday | 25 | 92% |
| Sunday | 26 | 100% |
Why it was late
All flights SMF → SEA · Connecting off DL 4125? Check the risk
Questions
How often is DL 4125 from SEA to SMF late?
Delta Air Lines 4125 from Seattle, WA to Sacramento, CA arrived 15 or more minutes late, was diverted or was cancelled on 9% of 349 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
How often is DL 4125 from SMF to SEA late?
Delta Air Lines 4125 from Sacramento, CA to Seattle, WA arrived 15 or more minutes late, was diverted or was cancelled on 6% of 177 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.