Flight number record

DL 777

Delta Air Lines · Atlanta to Las Vegas

Route: ATL → LAS
Departs: 08:15
Flights: 341
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s DL 777, check with Delta Air Lines.

DL 777 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 341 flights, with a median arrival 5 minutes early.

Set against the rest of the country, DL 777's record is 8 points better than the US average of 77.3%. That gap is worth roughly 82 fewer late arrivals for every thousand flights.

On time

85.5%

Arrivals under 15 minutes late, of 337 completed flights

Avg delay

49 min

Across delayed arrivals only, not all flights

Cancelled

1.17%

National rate is 1.89%

1 hour+ late

3.9%

National rate is 8.3%

These figures cover 341 flights between September 2025 and August 2026. The median arrival is 5 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 777 flies

DL 777 flies ATL to LAS without a single fixed slot. Its most common scheduled departure was 08:15, used on 64 of 341 flights, with 07:30 (51 flights) and 08:55 (48 flights) next.

Departs 08:1564 flights18.8%
Departs 07:3051 flights15.0%
Departs 08:5548 flights14.1%

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 08:15 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 777 runs level with that at 85.5%. 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 777 next to ATL to LAS

Every carrier on ATL to LAS combined arrived on time 74.8% of the time across 4,758 flights, so DL 777 is 11 points ahead of it. Delta flew 3,324 flights on the same city pair under all its flight numbers, including this one, and those ran 76.5% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 4 points.

DL 777 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 777thin sample	341	85.5%	49 min	1.17%	A
All Delta Air Lines on ATL–LAS	3,324	76.5%	57 min	0.66%	B+
All carriers on ATL–LAS	4,758	74.8%	63 min	0.78%	C+
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 777 quarter by quarter

Quarter by quarter DL 777 held fairly steady: 86.7% in Jul–Sep 2025, 89.1% in Oct–Dec 2025, 85.1% in Jan–Mar 2026, 83.6% in Apr–Jun 2026 and 82.0% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202530 flights86.7%
Oct–Dec 202592 flights89.1%
Jan–Mar 202690 flights85.1%
Apr–Jun 202667 flights83.6%
Jul–Sep 202662 flights82.0%

Scale runs 75% to 95%.

By weekday, DL 777 did best on Wednesday at 91.7% on time and worst on Friday at 79.6%. Each day rests on about 49 flights, so a gap of 12 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 777 runs when it is late

Most of the lateness is short. 26 of the 49 late arrivals were under half an hour behind, and 13 reached an hour or more.

15+ min early84 flights24.9%
Within 15 min204 flights60.5%
15–29 min late26 flights7.7%
30–59 min late10 flights3.0%
1–2 hours late8 flights2.4%
2+ hours late5 flights1.5%

Scale runs 0% to 100%.

Share of 337 completed flights by arrival against schedule.

11 of 40 late departures made up the time and arrived on time, 28% of them. In the other direction, 20 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 LAS.

The worst days

Worst days for DL 777

The latest arrival of the period was on 7 March 2026, 3 hours 17 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).

The latest arrivals of DL 777 in the period
Date	Arrived late by	Largest filed cause
7 March 2026	3 hours 17 minutes	National Airspace System
4 April 2026	3 hours	Carrier
10 April 2026	2 hours 36 minutes	Carrier
10 May 2026	2 hours 15 minutes	Carrier
22 November 2025	2 hours 5 minutes	Carrier

Delay causes

Why DL 777 runs late

Carrier accounts for 60% of the 2,386 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
60%
National Airspace System
35%
Late-arriving aircraft
2%
Extreme weather
2%

35% 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 843 minutes out of 2,386, against a national NAS share of 21%. The split is drawn from 2,386 delay minutes reported on DL 777.

Cancellations sit at 1.17% against a national 1.89%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.9% 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.

At 1,747 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 LAS to ATL (214), but none flew often enough under DL 777 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to LAS only.

One caution: this is a thin sample. 341 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 777

For a booking, DL 777 has one of the better records a US domestic flight can show: 85.5% on time and 1.17% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures