Flight number record
DL 2777
Delta Air Lines · Detroit to Atlanta
- Route
- DTW → ATL
- Departs
- 09:25
- Flights
- 298
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2777, check with Delta Air Lines.
DL 2777 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 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 298 flights, with a median arrival 9 minutes early.
Set against the rest of the country, DL 2777's record is 10 points better than the US average of 77.3%. That gap is worth roughly 103 fewer late arrivals for every thousand flights.
Key figures
On time
87.6%
Arrivals under 15 minutes late, of 298 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
3.4%
National rate is 8.3%
These figures cover 298 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 2777 flies
DL 2777 flies DTW to ATL without a single fixed slot. Its most common scheduled departure was 09:25, used on 86 of 298 flights, with 09:30 (49 flights) and 09:05 (43 flights) next.
- Departs 09:2586 flights28.9%
- Departs 09:3049 flights16.4%
- Departs 09:0543 flights14.4%
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 09:25 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 2777 runs 4 points better at 87.6%. 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 2777 next to DTW to ATL
Every carrier on DTW to ATL combined arrived on time 78.9% of the time across 4,832 flights, so DL 2777 is 9 points ahead of it. Delta flew 3,780 flights on the same city pair under all its flight numbers, including this one, and those ran 81.2% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2777thin sample | 298 | 87.6% | 78 min | 0.00% | A+ |
| All Delta Air Lines on DTW–ATL | 3,780 | 81.2% | 68 min | 0.48% | B+ |
| All carriers on DTW–ATL | 4,832 | 78.9% | 75 min | 0.79% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2777 quarter by quarter
DL 2777 did not run the same all year. Its best quarter was Apr–Jun 2026 at 95.6% on time and its weakest Jan–Mar 2026 at 79.0%, a swing of 17 points on roughly 75 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 202521 flights—
- Oct–Dec 202562 flights82.3%
- Jan–Mar 202662 flights79.0%
- Apr–Jun 202691 flights95.6%
- Jul–Sep 202662 flights87.1%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2777 did best on Thursday at 95.5% on time and worst on Sunday at 81.4%. Each day rests on about 43 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2777 runs when it is late
DL 2777 often beats the schedule: 96 of 298 completed flights, 32%, arrived 15 minutes or more early. The 37 late arrivals split 13 under half an hour, 14 between 30 and 60 minutes, and 10 an hour or more.
- 15+ min early96 flights32.2%
- Within 15 min165 flights55.4%
- 15–29 min late13 flights4.4%
- 30–59 min late14 flights4.7%
- 1–2 hours late4 flights1.3%
- 2+ hours late6 flights2.0%
Scale runs 0% to 100%.
Share of 298 completed flights by arrival against schedule.
A late pushback is often recovered here: of 40 departures that left 15 minutes late or more, 13 still arrived on time. 10 flights left on time and still arrived late.
The worst days
Worst days for DL 2777
The latest arrival of the period was on 13 January 2026, 6 hours 22 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 January 2026 | 6 hours 22 minutes | Carrier |
| 30 November 2025 | 5 hours 31 minutes | Carrier |
| 24 November 2025 | 4 hours 46 minutes | Carrier |
| 16 January 2026 | 4 hours 13 minutes | Extreme weather |
| 7 December 2025 | 4 hours 12 minutes | Late-arriving aircraft |
Delay causes
Why DL 2777 runs late
Carrier accounts for 61% of the 2,895 delay minutes carriers reported here, and the remaining four split what is left.
- 61%Carrier
- 17%Late-arriving aircraft
- 15%National Airspace System
- 6%Extreme weather
The largest share of delay minutes, 61%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,766 of the 2,895 delay minutes reported here. The split is drawn from 2,895 delay minutes reported on DL 2777.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are 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 3.4% 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.
The 594 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
Every one of the 298 flights under DL 2777 in the data flew DTW 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. 298 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 2777
For a booking, DL 2777 has one of the better records a US domestic flight can show: 87.6% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- DTW to ATL, every carrier and departure
- ATL to DTW, the return direction
- Delta Air Lines 2856 on the same route86.5%
- Delta Air Lines 1611 on the same route87.2%
- Delta Air Lines 1467 on the same route76.2%
- Delta Air Lines 2375 on the same route91.2%
- Delta Air Lines 2053 on the same route72.4%
- Delta Air Lines 965 on the same route86.6%
- Detroit Metropolitan Wayne County (DTW) 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.