Flight number record
DL 677
Delta Air Lines · Las Vegas to Atlanta
- Route
- LAS → ATL
- Departs
- 07:05
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 677, check with Delta Air Lines.
DL 677 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 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 365 flights, with a median arrival 9 minutes early.
Set against the rest of the country, DL 677's record is 14 points better than the US average of 77.3%. That gap is worth roughly 143 fewer late arrivals for every thousand flights.
Key figures
On time
91.6%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
86 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
3.9%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 9 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 677 flies
DL 677 flies LAS to ATL without a single fixed slot. Its most common scheduled departure was 07:05, used on 117 of 365 flights, with 07:15 (107 flights) and 07:10 (59 flights) next.
- Departs 07:05117 flights32.1%
- Departs 07:15107 flights29.3%
- Departs 07:1059 flights16.2%
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 07:05 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 677 runs 2 points better at 91.6%. 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 677 next to LAS to ATL
Every carrier on LAS to ATL combined arrived on time 83.8% of the time across 4,755 flights, so DL 677 is 8 points ahead of it. Delta flew 3,323 flights on the same city pair under all its flight numbers, including this one, and those ran 85.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 677 | 365 | 91.6% | 86 min | 0.55% | A+ |
| All Delta Air Lines on LAS–ATL | 3,323 | 85.7% | 85 min | 0.84% | A+ |
| All carriers on LAS–ATL | 4,755 | 83.8% | 75 min | 0.84% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 677 quarter by quarter
DL 677 did not run the same all year. Its best quarter was Apr–Jun 2026 at 95.6% on time and its weakest Jul–Sep 2026 at 83.3%, a swing of 12 points on roughly 73 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 202530 flights90.0%
- Oct–Dec 202592 flights93.3%
- Jan–Mar 202690 flights92.1%
- Apr–Jun 202691 flights95.6%
- Jul–Sep 202662 flights83.3%
Scale runs 75% to 100%.
By weekday, DL 677 ranged from 86.8% on Monday to 98.1% on Tuesday. With about 52 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 677 runs when it is late
DL 677 often beats the schedule: 115 of 359 completed flights, 32%, arrived 15 minutes or more early. The 30 late arrivals split 10 under half an hour, 6 between 30 and 60 minutes, and 14 an hour or more.
- 15+ min early115 flights32.0%
- Within 15 min214 flights59.6%
- 15–29 min late10 flights2.8%
- 30–59 min late6 flights1.7%
- 1–2 hours late7 flights1.9%
- 2+ hours late7 flights1.9%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
6 of 25 late departures made up the time and arrived on time, 24% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for DL 677
The latest arrival of the period was on 15 September 2025, 8 hours 3 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 September 2025 | 8 hours 3 minutes | Carrier |
| 7 September 2025 | 3 hours 52 minutes | Carrier |
| 15 February 2026 | 3 hours 43 minutes | Carrier |
| 20 February 2026 | 3 hours 35 minutes | Carrier |
| 18 May 2026 | 2 hours 53 minutes | Carrier |
Delay causes
Why DL 677 runs late
Carrier accounts for 83% of the 2,579 delay minutes carriers reported here, and the remaining four split what is left.
- 83%Carrier
- 17%National Airspace System
The largest share of delay minutes, 83%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,138 of the 2,579 delay minutes reported here. The split is drawn from 2,579 delay minutes reported on DL 677.
Cancellations are rare at 0.55%, below the national 1.89% 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 3.9% 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.
Every one of the 365 flights under DL 677 in the data flew LAS to ATL. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 365 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 677
For a booking, DL 677 has one of the better records a US domestic flight can show: 91.6% on time and 0.55% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- LAS to ATL, every carrier and departure
- ATL to LAS, the return direction
- Delta Air Lines 755 on the same route93.1%
- Frontier Airlines 2428 on the same route67.9%
- Delta Air Lines 466 on the same route81.7%
- Frontier Airlines 1116 on the same route84.0%
- Delta Air Lines 722 on the same route86.1%
- Harry Reid International (LAS) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
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 ; recomputed monthly. How this data is collected.