Flight number record

DL 710

Delta Air Lines · New York to Denver

Route: LGA → DEN
Departs: 18:29
Flights: 311
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s DL 710, check with Delta Air Lines.

DL 710 draws a D−. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 311 flights, with a median arrival 1 minute late.

The national on-time rate over the same period is 77.3%, so DL 710 runs 19 points behind the country as a whole. Across a thousand flights that is about 189 extra late arrivals.

On time

58.4%

Arrivals under 15 minutes late, of 291 completed flights

Avg delay

77 min

Across delayed arrivals only, not all flights

Cancelled

5.47%

National rate is 1.89%

1 hour+ late

19.6%

National rate is 8.3%

These figures cover 311 flights between September 2025 and August 2026. Beyond the headline rate, 19.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Schedule

When DL 710 flies

DL 710 flies LGA to DEN without a single fixed slot. Its most common scheduled departure was 18:29, used on 78 of 311 flights, with 18:00 (42 flights) and 18:10 (34 flights) next.

Departs 18:2978 flights25.1%
Departs 18:0042 flights13.5%
Departs 18:1034 flights10.9%

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 18:29 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 710 runs 10 points worse at 58.4%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

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Against the route

DL 710 next to LGA to DEN

Every carrier on LGA to DEN combined arrived on time 70.0% of the time across 4,663 flights, so DL 710 is 12 points behind it. Delta flew 1,033 flights on the same city pair under all its flight numbers, including this one, and those ran 70.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 23 points.

DL 710 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 710thin sample	311	58.4%	77 min	5.47%	D−
All Delta Air Lines on LGA–DEN	1,033	70.7%	68 min	4.55%	C−
All carriers on LGA–DEN	4,663	70.0%	71 min	3.28%	C−
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 710 quarter by quarter

DL 710 did not run the same all year. Its best quarter was Jan–Mar 2026 at 71.4% on time and its weakest Jul–Sep 2026 at 47.9%, a swing of 24 points on roughly 78 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 202526 flights—
Oct–Dec 202577 flights52.1%
Jan–Mar 202677 flights71.4%
Apr–Jun 202678 flights57.3%
Jul–Sep 202653 flights47.9%

Scale runs 40% to 75%. Rows with fewer than 30 flights show a dash.

By weekday, DL 710 ranged from 54.2% on Wednesday to 63.3% on Friday. With about 44 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.

Arrival by arrival

How late DL 710 runs when it is late

DL 710 often beats the schedule: 89 of 291 completed flights, 31%, arrived 15 minutes or more early. The 121 late arrivals split 39 under half an hour, 25 between 30 and 60 minutes, and 57 an hour or more.

15+ min early89 flights30.6%
Within 15 min81 flights27.8%
15–29 min late39 flights13.4%
30–59 min late25 flights8.6%
1–2 hours late36 flights12.4%
2+ hours late21 flights7.2%

Scale runs 0% to 100%.

Share of 291 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 103 departures that left 15 minutes late or more, only 10 made it up before arrival. In the other direction, 28 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 DEN.

The worst days

Worst days for DL 710

The latest arrival of the period was on 25 November 2025, 6 hours 44 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.

The latest arrivals of DL 710 in the period
Date	Arrived late by	Largest filed cause
25 November 2025	6 hours 44 minutes	Carrier
23 December 2025	5 hours 9 minutes	Late-arriving aircraft
15 July 2026	4 hours 57 minutes	National Airspace System
20 May 2026	4 hours 43 minutes	Late-arriving aircraft
6 August 2026	4 hours 7 minutes	Late-arriving aircraft

Delay causes

Why DL 710 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 9,317 reported delay minutes.

National Airspace System
34%
Late-arriving aircraft
33%
Carrier
32%
Extreme weather
1%

34% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 3,154 minutes out of 9,317, against a national NAS share of 21%. The split is drawn from 9,317 delay minutes reported on DL 710.

Cancellations run at 5.47%, against 1.89% nationally. That is roughly one flight in twenty 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

19.6% 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 1,620 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 IND to ATL (9), but none flew often enough under DL 710 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LGA to DEN only.

One caution: this is a thin sample. 311 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 710

For a booking, the cancellation rate is the figure to plan around on DL 710: 5.47% of its 311 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.

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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures