About 1 in 8 DL 4078 flights from Las Vegas arrived 15+ minutes late, diverted or cancelled over the past year (12%); 0.0% were cancelled. The typical flight landed 11 minutes early.
DL 4078: LAS → SNA
Scheduled to leave Las Vegas at 8:00 a.m. local time, operated by SkyWest as OO 4078. Over the past year it arrived on time 88% of the time (365 flights), in line with other DL flights on the route at that hour (88%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 83% |
| Tuesday | 52 | 85% |
| Wednesday | 52 | 92% |
| Thursday | 52 | 98% |
| Friday | 52 | 88% |
| Saturday | 52 | 83% |
| Sunday | 52 | 87% |
Why it was late
All flights LAS → SNA · Connecting off DL 4078? Check the risk
DL 4078: SNA → LAS
Scheduled to leave Santa Ana at 9:59 a.m. local time, operated by SkyWest as OO 4078. Over the past year it arrived on time 88% of the time (349 flights), worse than other DL flights on the route at that hour (92%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 51 | 86% |
| Tuesday | 50 | 84% |
| Wednesday | 50 | 92% |
| Thursday | 50 | 94% |
| Friday | 50 | 82% |
| Saturday | 49 | 86% |
| Sunday | 49 | 92% |
Why it was late
All flights SNA → LAS · Connecting off DL 4078? Check the risk
Questions
How often is DL 4078 from LAS to SNA late?
Delta Air Lines 4078 from Las Vegas, NV to Santa Ana, CA arrived 15 or more minutes late, was diverted or was cancelled on 12% of 365 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
How often is DL 4078 from SNA to LAS late?
Delta Air Lines 4078 from Santa Ana, CA to Las Vegas, NV arrived 15 or more minutes late, was diverted or was cancelled on 12% of 349 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.