Flight number record
DL 1034
Delta Air Lines · Atlanta to New York
- Route
- ATL → JFK
- Departs
- 09:00
- Flights
- 281
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1034, check with Delta Air Lines.
DL 1034 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 50 minutes. That rests on 281 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 1034's record is 12 points better than the US average of 77.3%. That gap is worth roughly 119 fewer late arrivals for every thousand flights.
Key figures
On time
89.2%
Arrivals under 15 minutes late, of 279 completed flights
Avg delay
50 min
Across delayed arrivals only, not all flights
Cancelled
0.36%
National rate is 1.89%
1 hour+ late
2.2%
National rate is 8.3%
These figures cover 281 flights between September 2025 and August 2026. The median arrival is 10 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When DL 1034 flies
DL 1034 flies ATL to JFK without a single fixed slot. Its most common scheduled departure was 09:00, used on 87 of 281 flights, with 09:40 (50 flights) and 08:55 (35 flights) next.
- Departs 09:0087 flights31.0%
- Departs 09:4050 flights17.8%
- Departs 08:5535 flights12.5%
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 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 1034 runs 5 points better at 89.2%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 1034 next to ATL to JFK
Every carrier on ATL to JFK combined arrived on time 74.6% of the time across 4,218 flights, so DL 1034 is 15 points ahead of it. Delta flew 2,445 flights on the same city pair under all its flight numbers, including this one, and those ran 78.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1034thin sample | 281 | 89.2% | 50 min | 0.36% | A+ |
| All Delta Air Lines on ATL–JFK | 2,445 | 78.4% | 73 min | 1.55% | B |
| All carriers on ATL–JFK | 4,218 | 74.6% | 81 min | 2.80% | C |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1034 quarter by quarter
Quarter by quarter DL 1034 held fairly steady: 96.7% in Jul–Sep 2025, 89.9% in Oct–Dec 2025, 87.6% in Apr–Jun 2026 and 88.3% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights96.7%
- Oct–Dec 202579 flights89.9%
- Jan–Mar 202621 flights—
- Apr–Jun 202689 flights87.6%
- Jul–Sep 202662 flights88.3%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1034 ranged from 85.0% on Sunday to 95.1% on Friday. With about 40 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 1034 runs when it is late
DL 1034 often beats the schedule: 90 of 279 completed flights, 32%, arrived 15 minutes or more early. The 30 late arrivals split 14 under half an hour, 10 between 30 and 60 minutes, and 6 an hour or more.
- 15+ min early90 flights32.3%
- Within 15 min159 flights57.0%
- 15–29 min late14 flights5.0%
- 30–59 min late10 flights3.6%
- 1–2 hours late3 flights1.1%
- 2+ hours late3 flights1.1%
Scale runs 0% to 100%.
Share of 279 completed flights by arrival against schedule.
A late pushback is often recovered here: of 35 departures that left 15 minutes late or more, 11 still arrived on time. 6 flights left on time and still arrived late.
The worst days
Worst days for DL 1034
The latest arrival of the period was on 14 December 2025, 3 hours 54 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across December, May, April and March, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 December 2025 | 3 hours 54 minutes | National Airspace System |
| 7 May 2026 | 2 hours 43 minutes | Late-arriving aircraft |
| 23 April 2026 | 2 hours 7 minutes | Carrier |
| 16 March 2026 | 1 hour 59 minutes | Late-arriving aircraft |
| 7 December 2025 | 1 hour 13 minutes | National Airspace System |
Delay causes
Why DL 1034 runs late
Carrier accounts for 49% of the 1,511 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Carrier
- 32%National Airspace System
- 17%Late-arriving aircraft
- 2%Extreme weather
The largest share of delay minutes, 49%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 745 of the 1,511 delay minutes reported here. The split is drawn from 1,511 delay minutes reported on DL 1034.
Cancellations are rare at 0.36%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.2% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 760 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on three other city pairs in the data, including LAS to CVG (58), ATL to FLL (16) and FLL to ATL (16), but none flew often enough under DL 1034 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to JFK only.
One caution: this is a thin sample. 281 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 1034
For a booking, DL 1034 has one of the better records a US domestic flight can show: 89.2% on time and 0.36% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- ATL to JFK, every carrier and departure
- JFK to ATL, the return direction
- Delta Air Lines 2398 on the same route72.8%
- Delta Air Lines 2380 on the same route80.7%
- Delta Air Lines 2420 on the same route89.3%
- Frontier Airlines 4732 on the same route73.3%
- JetBlue Airways 320 on the same route83.8%
- Delta Air Lines 2378 on the same route67.3%
- Hartsfield-Jackson Atlanta International (ATL) 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
- Worst months to fly in the US, ranked by the data
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.