Flight number record

DL 510

Delta Air Lines · Las Vegas to New York

Route: LAS → JFK
Departs: 07:00
Flights: 349
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 510, check with Delta Air Lines.

DL 510 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 18 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 349 flights, with a median arrival 19 minutes early.

Set against the rest of the country, DL 510's record is 18 points better than the US average of 77.6%. That gap is worth roughly 183 fewer late arrivals for every thousand flights.

On time

95.9%

Arrivals under 15 minutes late, of 341 completed flights

Avg delay

75 min

Across delayed arrivals only, not all flights

Cancelled

1.72%

National rate is 1.81%

1 hour+ late

2.1%

National rate is 8.1%

These figures cover 349 flights between July 2025 and June 2026. The median arrival is 19 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 510 flies

DL 510 flies LAS to JFK without a single fixed slot. Its most common scheduled departure was 07:00, used on 124 of 349 flights, with 06:45 (72 flights) and 07:10 (64 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:00124 flights35.5%
Departs 06:4572 flights20.6%
Departs 07:1064 flights18.3%

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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 510 runs 7 points better at 95.9%. 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 510 next to LAS to JFK

Every carrier on LAS to JFK combined arrived on time 81.3% of the time across 3,710 flights, so DL 510 is 15 points ahead of it. Delta flew 1,676 flights on the same city pair under all its flight numbers, including this one, and those ran 84.2% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 14 points.

DL 510 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 510thin sample	349	95.9%	75 min	1.72%	A
All Delta Air Lines on LAS–JFK	1,676	84.2%	78 min	2.45%	B
All carriers on LAS–JFK	3,710	81.3%	87 min	2.40%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 510 quarter by quarter

Quarter by quarter DL 510 held fairly steady: 94.5% in Jul–Sep 2025, 96.2% in Oct–Dec 2025, 96.3% in Jan–Mar 2026 and 96.7% in Apr–Jun 2026. A spread of 2 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights94.5%
Oct–Dec 202580 flights96.2%
Jan–Mar 202686 flights96.3%
Apr–Jun 202691 flights96.7%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 510 ranged from 92.0% on Tuesday to 100.0% on Saturday. With about 50 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 510 runs late

One category carries most of the weight here. National Airspace System accounts for 53% of the 1,048 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.

National Airspace System
53%
Carrier
36%
Late-arriving aircraft
11%

The largest share of delay minutes, 36%, 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 376 of the 1,048 delay minutes reported here. The split is drawn from 1,048 delay minutes reported on DL 510.

Cancellations sit at 1.72% against a national 1.81%, which is ordinary. Diversions add another 0.57%.

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.

At 2,248 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 DTW to MEM (16), but none flew often enough under DL 510 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAS to JFK only.

One caution: this is a thin sample. 349 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 510

For a booking, read DL 510 as 95.9% on time with 1.72% cancelled over 349 flights. Those are rates from the past twelve months, not a forecast for any particular 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