About 1 in 13 DL 4134 flights from Salt Lake City arrived 15+ minutes late, diverted or cancelled over the past year (8%); 0.5% were cancelled. The typical flight landed 6 minutes early.
DL 4134: SLC → OAK
Scheduled to leave Salt Lake City at 10:50 a.m. local time, operated by SkyWest as OO 4134. Over the past year it arrived on time 92% of the time (365 flights), in line with 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 | 53 | 94% |
| Tuesday | 52 | 96% |
| Wednesday | 52 | 94% |
| Thursday | 52 | 90% |
| Friday | 52 | 87% |
| Saturday | 52 | 92% |
| Sunday | 52 | 90% |
Why it was late
All flights SLC → OAK · Connecting off DL 4134? Check the risk
DL 4134: OAK → SLC
Scheduled to leave Oakland at 12:33 p.m. local time, operated by SkyWest as OO 4134. Over the past year it arrived on time 93% of the time (365 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 | 53 | 94% |
| Tuesday | 52 | 94% |
| Wednesday | 52 | 94% |
| Thursday | 52 | 92% |
| Friday | 52 | 94% |
| Saturday | 52 | 94% |
| Sunday | 52 | 88% |
Why it was late
All flights OAK → SLC · Connecting off DL 4134? Check the risk
Questions
How often is DL 4134 from SLC to OAK late?
Delta Air Lines 4134 from Salt Lake City, UT to Oakland, CA arrived 15 or more minutes late, was diverted or was cancelled on 8% of 365 scheduled flights between September 2025 and August 2026. 0.5% were cancelled.
How often is DL 4134 from OAK to SLC late?
Delta Air Lines 4134 from Oakland, CA to Salt Lake City, UT arrived 15 or more minutes late, was diverted or was cancelled on 7% of 365 scheduled flights between September 2025 and August 2026. 0.5% 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.