About 1 in 7 DL 3951 flights from Los Angeles arrived 15+ minutes late, diverted or cancelled over the past year (13%); 0.4% were cancelled. The typical flight landed 7 minutes early.
DL 3951: LAX → PHX
Scheduled to leave Los Angeles at 10:01 a.m. local time, operated by SkyWest as OO 3951. Over the past year it arrived on time 87% of the time (289 flights), in line with other DL flights on the route at that hour (86%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 46 | 91% |
| Tuesday | 45 | 89% |
| Wednesday | 44 | 91% |
| Thursday | 42 | 88% |
| Friday | 42 | 76% |
| Saturday | 28 | 86% |
| Sunday | 42 | 83% |
Why it was late
All flights LAX → PHX · Connecting off DL 3951? Check the risk
DL 3951: PHX → LAX
Scheduled to leave Phoenix at 12:15 p.m. local time, operated by SkyWest as OO 3951. Over the past year it arrived on time 87% of the time (270 flights), in line with other DL flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 42 | 93% |
| Tuesday | 41 | 93% |
| Wednesday | 40 | 93% |
| Thursday | 40 | 83% |
| Friday | 40 | 85% |
| Saturday | 28 | 82% |
| Sunday | 39 | 82% |
Why it was late
All flights PHX → LAX · Connecting off DL 3951? Check the risk
Questions
How often is DL 3951 from LAX to PHX late?
Delta Air Lines 3951 from Los Angeles, CA to Phoenix, AZ arrived 15 or more minutes late, was diverted or was cancelled on 13% of 289 scheduled flights between September 2025 and August 2026. 0.4% were cancelled.
How often is DL 3951 from PHX to LAX late?
Delta Air Lines 3951 from Phoenix, AZ to Los Angeles, CA arrived 15 or more minutes late, was diverted or was cancelled on 13% of 270 scheduled flights between September 2025 and August 2026. 0.4% 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.