Flight number record

DL 1034

Delta Air Lines · Atlanta to New York

Route: ATL → JFK
Departs: 09:00
Flights: 281
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 14 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 281 flights, with a median arrival 12 minutes early.

Set against the rest of the country, DL 1034's record is 14 points better than the US average of 77.6%. That gap is worth roughly 142 fewer late arrivals for every thousand flights.

On time

91.8%

Arrivals under 15 minutes late, of 281 completed flights

Avg delay

58 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

2.1%

National rate is 8.1%

These figures cover 281 flights between July 2025 and June 2026. The median arrival is 12 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.

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 93 of 281 flights, with 08:55 (58 flights) and 09:40 (45 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:0093 flights33.1%
Departs 08:5558 flights20.6%
Departs 09:4045 flights16.0%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 84.1%, and DL 1034 runs 8 points better at 91.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 1034 next to ATL to JFK

Every carrier on ATL to JFK combined arrived on time 75.3% of the time across 4,263 flights, so DL 1034 is 17 points ahead of it. Delta flew 2,448 flights on the same city pair under all its flight numbers, including this one, and those ran 79.7% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 10 points.

DL 1034 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1034thin sample	281	91.8%	58 min	0.00%	A+
All Delta Air Lines on ATL–JFK	2,448	79.7%	75 min	1.51%	B
All carriers on ATL–JFK	4,263	75.3%	83 min	2.35%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1034 quarter by quarter

DL 1034 did not run the same all year. Its best quarter was Jul–Sep 2025 at 98.9% on time and its weakest Apr–Jun 2026 at 87.6%, a swing of 11 points on roughly 94 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 202592 flights98.9%
Oct–Dec 202579 flights89.9%
Jan–Mar 202621 flights—
Apr–Jun 202689 flights87.6%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1034 ranged from 87.8% on Sunday to 95.1% on Thursday. With about 40 flights behind each day, a spread of 7 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 1034 runs late

One category carries most of the weight here. Carrier accounts for 47% of the 1,333 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
47%
National Airspace System
33%
Late-arriving aircraft
19%
Extreme weather
2%

The largest share of delay minutes, 47%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 622 of the 1,333 delay minutes reported here. The split is drawn from 1,333 delay minutes reported on DL 1034.

Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are 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 2.1% land an hour or more behind schedule, against 8.1% 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

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: 91.8% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures