Flight number record
DL 747
Delta Air Lines · New York to Los Angeles
- Route
- JFK → LAX
- Departs
- 13:30
- Flights
- 338
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 747, check with Delta Air Lines.
DL 747 lands a B, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 338 flights, with a median arrival 8 minutes early.
Key figures
On time
77.6%
Arrivals under 15 minutes late, of 330 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
2.37%
National rate is 1.89%
1 hour+ late
9.7%
National rate is 8.3%
These figures cover 338 flights between September 2025 and August 2026. Beyond the headline rate, 9.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 747 flies
DL 747 flies JFK to LAX without a single fixed slot. Its most common scheduled departure was 13:30, used on 134 of 338 flights, with 13:45 (94 flights) next.
- Departs 13:30134 flights39.6%
- Departs 13:4594 flights27.8%
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 13:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 747 runs level with that at 77.6%. 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 747 next to JFK to LAX
Every carrier on JFK to LAX combined arrived on time 75.4% of the time across 10,285 flights, so DL 747 is 2 points ahead of it. Delta flew 3,366 flights on the same city pair under all its flight numbers, including this one, and those ran 75.3% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 747thin sample | 338 | 77.6% | 73 min | 2.37% | B |
| All Delta Air Lines on JFK–LAX | 3,366 | 75.3% | 67 min | 2.55% | B |
| All carriers on JFK–LAX | 10,285 | 75.4% | 78 min | 2.78% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 747 quarter by quarter
DL 747 did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.5% on time and its weakest Apr–Jun 2026 at 68.7%, a swing of 20 points on roughly 68 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 flights73.3%
- Oct–Dec 202590 flights80.9%
- Jan–Mar 202681 flights88.5%
- Apr–Jun 202683 flights68.7%
- Jul–Sep 202654 flights72.0%
Scale runs 60% to 95%.
By weekday, DL 747 did best on Wednesday at 84.1% on time and worst on Saturday at 61.9%. Each day rests on about 48 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 747 runs when it is late
DL 747 often beats the schedule: 129 of 330 completed flights, 39%, arrived 15 minutes or more early. The 74 late arrivals split 26 under half an hour, 16 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early129 flights39.1%
- Within 15 min127 flights38.5%
- 15–29 min late26 flights7.9%
- 30–59 min late16 flights4.8%
- 1–2 hours late17 flights5.2%
- 2+ hours late15 flights4.5%
Scale runs 0% to 100%.
Share of 330 completed flights by arrival against schedule.
12 of 62 late departures made up the time and arrived on time, 19% of them. In the other direction, 24 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 LAX.
The worst days
Worst days for DL 747
The latest arrival of the period was on 9 November 2025, 4 hours 51 minutes behind schedule; most of its delay minutes were filed as extreme weather. Three of the five worst days fell in September 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 November 2025 | 4 hours 51 minutes | Extreme weather |
| 8 August 2026 | 3 hours 53 minutes | Late-arriving aircraft |
| 7 September 2025 | 3 hours 27 minutes | Carrier |
| 27 September 2025 | 3 hours 26 minutes | Carrier |
| 19 September 2025 | 3 hours 13 minutes | Carrier |
Delay causes
Why DL 747 runs late
Carrier accounts for 54% of the 5,435 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Carrier
- 20%National Airspace System
- 19%Late-arriving aircraft
- 6%Extreme weather
- 1%Security
The largest share of delay minutes, 54%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,945 of the 5,435 delay minutes reported here. The split is drawn from 5,435 delay minutes reported on DL 747.
Cancellations sit at 2.37% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
9.7% 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 BOS to LGA (9), but none flew often enough under DL 747 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to JFK to LAX only.
One caution: this is a thin sample. 338 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 747
For a booking, read DL 747 as 77.6% on time with 2.37% cancelled over 338 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- JFK to LAX, every carrier and departure
- LAX to JFK, the return direction
- Delta Air Lines 738 on the same route72.7%
- American Airlines 171 on the same route88.1%
- Delta Air Lines 773 on the same route78.6%
- American Airlines 117 on the same route69.1%
- American Airlines 255 on the same route78.3%
- American Airlines 341 on the same route76.4%
- John F. Kennedy International (JFK) delay statistics
- Los Angeles International (LAX) 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
- How often a connection fails at the major US hubs
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.