Flight number record

DL 777

Delta Air Lines · Atlanta to Las Vegas

Route: ATL → LAS
Departs: 07:30
Flights: 341
Period: July 2025 to June 2026

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

DL 777 earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 45 minutes. That rests on 341 flights, with a median arrival 4 minutes early.

Set against the rest of the country, DL 777's record is 7 points better than the US average of 77.6%. That gap is worth roughly 70 fewer late arrivals for every thousand flights.

On time

84.6%

Arrivals under 15 minutes late, of 338 completed flights

Avg delay

45 min

Across delayed arrivals only, not all flights

Cancelled

0.88%

National rate is 1.81%

1 hour+ late

3.0%

National rate is 8.1%

These figures cover 341 flights between July 2025 and June 2026. The median arrival is 4 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 777 flies

DL 777 flies ATL to LAS without a single fixed slot. Its most common scheduled departure was 07:30, used on 51 of 341 flights, with 08:55 (48 flights) and 09:45 (39 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:3051 flights15.0%
Departs 08:5548 flights14.1%
Departs 09:4539 flights11.4%

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 07:30 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 777 runs 5 points worse at 84.6%. 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 777 next to ATL to LAS

Every carrier on ATL to LAS combined arrived on time 75.9% of the time across 4,796 flights, so DL 777 is 9 points ahead of it. Delta flew 3,329 flights on the same city pair under all its flight numbers, including this one, and those ran 77.3% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 3 points.

DL 777 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 777thin sample	341	84.6%	45 min	0.88%	B+
All Delta Air Lines on ATL–LAS	3,329	77.3%	55 min	0.60%	B+
All carriers on ATL–LAS	4,796	75.9%	60 min	0.77%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 777 quarter by quarter

Quarter by quarter DL 777 held fairly steady: 80.4% in Jul–Sep 2025, 89.1% in Oct–Dec 2025, 85.1% in Jan–Mar 2026 and 83.6% in Apr–Jun 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 202592 flights80.4%
Oct–Dec 202592 flights89.1%
Jan–Mar 202690 flights85.1%
Apr–Jun 202667 flights83.6%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 777 ranged from 81.2% on Monday to 89.6% on Wednesday. With about 49 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 777 runs late

One category carries most of the weight here. Carrier accounts for 60% of the 2,355 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
60%
National Airspace System
35%
Extreme weather
4%
Late-arriving aircraft
1%

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 834 minutes out of 2,355, against a national NAS share of 21%. The split is drawn from 2,355 delay minutes reported on DL 777.

Cancellations are rare at 0.88%, below the national 1.81% 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 3.0% 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 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 (159), 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, read DL 777 as 84.6% on time with 0.88% cancelled over 341 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