Flight number record
DL 951
Delta Air Lines · Los Angeles to New York
- Route
- LAX → JFK
- Departs
- 11:45
- Flights
- 331
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 951, check with Delta Air Lines.
DL 951 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land close to two hours behind schedule. That rests on 331 flights, with a median arrival 7 minutes early.
The national on-time rate over the same period is 77.3%, so DL 951 runs 4 points behind the country as a whole. Across a thousand flights that is about 44 extra late arrivals.
Key figures
On time
72.9%
Arrivals under 15 minutes late, of 317 completed flights
Avg delay
101 min
Across delayed arrivals only, not all flights
Cancelled
2.72%
National rate is 1.89%
1 hour+ late
13.6%
National rate is 8.3%
These figures cover 331 flights between September 2025 and August 2026. Beyond the headline rate, 13.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 951 flies
DL 951 flies LAX to JFK without a single fixed slot. Its most common scheduled departure was 11:45, used on 55 of 331 flights, with 10:10 (52 flights) next.
- Departs 11:4555 flights16.6%
- Departs 10:1052 flights15.7%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 11:45 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 951 runs 5 points worse at 72.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 951 next to LAX to JFK
Every carrier on LAX to JFK combined arrived on time 77.5% of the time across 10,289 flights, so DL 951 is 5 points behind it. Delta flew 3,367 flights on the same city pair under all its flight numbers, including this one, and those ran 79.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 951thin sample | 331 | 72.9% | 101 min | 2.72% | C |
| All Delta Air Lines on LAX–JFK | 3,367 | 79.4% | 87 min | 2.61% | B |
| All carriers on LAX–JFK | 10,289 | 77.5% | 90 min | 2.90% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 951 quarter by quarter
DL 951 did not run the same all year. Its best quarter was Oct–Dec 2025 at 79.5% on time and its weakest Jan–Mar 2026 at 63.5%, a swing of 16 points on roughly 66 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights76.7%
- Oct–Dec 202580 flights79.5%
- Jan–Mar 202677 flights63.5%
- Apr–Jun 202683 flights70.9%
- Jul–Sep 202661 flights76.8%
Scale runs 55% to 85%.
By weekday, DL 951 did best on Saturday at 83.3% on time and worst on Monday at 61.2%. Each day rests on about 47 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 951 runs when it is late
DL 951 often beats the schedule: 118 of 317 completed flights, 37%, arrived 15 minutes or more early. The 86 late arrivals split 26 under half an hour, 17 between 30 and 60 minutes, and 43 an hour or more.
- 15+ min early118 flights37.2%
- Within 15 min113 flights35.6%
- 15–29 min late26 flights8.2%
- 30–59 min late17 flights5.4%
- 1–2 hours late19 flights6.0%
- 2+ hours late24 flights7.6%
Scale runs 0% to 100%.
Share of 317 completed flights by arrival against schedule.
21 of 90 late departures made up the time and arrived on time, 23% of them. In the other direction, 17 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at JFK.
The worst days
Worst days for DL 951
The latest arrival of the period was on 30 October 2025, 8 hours 53 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 October 2025 | 8 hours 53 minutes | National Airspace System |
| 19 May 2026 | 7 hours 38 minutes | Carrier |
| 9 February 2026 | 6 hours 42 minutes | Carrier |
| 12 January 2026 | 6 hours 12 minutes | Carrier |
| 30 January 2026 | 5 hours 24 minutes | Carrier |
Delay causes
Why DL 951 runs late
Carrier accounts for 65% of the 8,689 delay minutes carriers reported here, and the remaining four split what is left.
- 65%Carrier
- 25%National Airspace System
- 10%Late-arriving aircraft
The largest share of delay minutes, 65%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 5,662 of the 8,689 delay minutes reported here. The split is drawn from 8,689 delay minutes reported on DL 951.
Cancellations run at 2.72%, against 1.89% nationally. That is roughly one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
13.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 2,475 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The same number turns up on one other city pair in the data, including MYR to ATL (16), but none flew often enough under DL 951 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to JFK only.
One caution: this is a thin sample. 331 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking DL 951
For a booking, the cancellation rate is the figure to plan around on DL 951: 2.72% of its 331 scheduled flights did not operate. A late arrival costs close to two hours, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- LAX to JFK, every carrier and departure
- JFK to LAX, the return direction
- Delta Air Lines 934 on the same route86.7%
- Delta Air Lines 960 on the same route83.1%
- American Airlines 118 on the same route83.6%
- American Airlines 307 on the same route74.6%
- Delta Air Lines 958 on the same route82.4%
- American Airlines 274 on the same route57.9%
- Los Angeles International (LAX) delay statistics
- John F. Kennedy International (JFK) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- The best time of day to fly, according to 7.05 million flight records
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.