About 1 in 9 DL 4043 flights from Seattle arrived 15+ minutes late, diverted or cancelled over the past year (12%); 0.3% were cancelled. The typical flight landed 7 minutes early.
DL 4043: SEA → SMF
Scheduled to leave Seattle at 5:00 p.m. local time, operated by SkyWest as OO 4043. Over the past year it arrived on time 88% of the time (316 flights), better than other DL flights on the route at that hour (82%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 49 | 90% |
| Tuesday | 48 | 92% |
| Wednesday | 48 | 90% |
| Thursday | 48 | 92% |
| Friday | 48 | 81% |
| Saturday | 29 | 90% |
| Sunday | 46 | 85% |
Why it was late
All flights SEA → SMF · Connecting off DL 4043? Check the risk
DL 4043: SMF → SEA
Scheduled to leave Sacramento at 7:41 p.m. local time, operated by SkyWest as OO 4043. Over the past year it arrived on time 85% of the time (157 flights), better than other DL flights on the route at that hour (82%). Last seen in the data Aug 31, 2026.
Usually Delta Air Lines's last flight of the day from Sacramento to Seattle (100% of days). Delta Air Lines's last SMF–SEA flight was cancelled 0.3% of the time, against 0.2% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 7:52 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 23 | 83% |
| Tuesday | 22 | 91% |
| Wednesday | 22 | 82% |
| Thursday | 25 | 80% |
| Friday | 25 | 72% |
| Saturday | 17 | — |
| Sunday | 23 | 91% |
Why it was late
All flights SMF → SEA · Connecting off DL 4043? Check the risk
Questions
How often is DL 4043 from SEA to SMF late?
Delta Air Lines 4043 from Seattle, WA to Sacramento, CA arrived 15 or more minutes late, was diverted or was cancelled on 12% of 316 scheduled flights between September 2025 and August 2026. 0.3% were cancelled.
How often is DL 4043 from SMF to SEA late?
Delta Air Lines 4043 from Sacramento, CA to Seattle, WA arrived 15 or more minutes late, was diverted or was cancelled on 15% of 157 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.