Flight number record
DL 2777
Delta Air Lines · Detroit to Atlanta
- Route
- DTW → ATL
- Departs
- 09:00
- Flights
- 288
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 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 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 288 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 77.6%. That gap is worth roughly 96 fewer late arrivals for every thousand flights.
Key figures
On time
87.2%
Arrivals under 15 minutes late, of 288 completed flights
Avg delay
80 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
1 hour+ late
4.2%
National rate is 8.1%
These figures cover 288 flights between July 2025 and June 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.
Schedule
When DL 2777 flies
DL 2777 flies DTW to ATL without a single fixed slot. Its most common scheduled departure was 09:00, used on 50 of 288 flights, with 09:30 (49 flights) and 09:05 (43 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 09:0050 flights17.4%
- Departs 09:3049 flights17.0%
- Departs 09:0543 flights14.9%
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 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 2777 runs 3 points better at 87.2%. 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 2777 next to DTW to ATL
Every carrier on DTW to ATL combined arrived on time 79.0% of the time across 4,881 flights, so DL 2777 is 8 points ahead of it. Delta flew 3,703 flights on the same city pair under all its flight numbers, including this one, and those ran 81.6% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2777thin sample | 288 | 87.2% | 80 min | 0.00% | A+ |
| All Delta Air Lines on DTW–ATL | 3,703 | 81.6% | 68 min | 0.49% | B+ |
| All carriers on DTW–ATL | 4,881 | 79.0% | 75 min | 0.80% | B+ |
| Delta Air Lines, whole network | 1,038,570 | 81.6% | 71 min | 1.62% | 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 72 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 202573 flights87.7%
- Oct–Dec 202562 flights82.3%
- Jan–Mar 202662 flights79.0%
- Apr–Jun 202691 flights95.6%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2777 did best on Thursday at 93.0% on time and worst on Sunday at 76.7%. Each day rests on about 41 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Delay causes
Why DL 2777 runs late
One category carries most of the weight here. Carrier accounts for 61% of the 2,947 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.
- 61%Carrier
- 19%Late-arriving aircraft
- 14%National Airspace System
- 6%Extreme weather
The largest share of delay minutes, 61%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,797 of the 2,947 delay minutes reported here. The split is drawn from 2,947 delay minutes reported on DL 2777.
Cancellations are rare at 0.00%, below the national 1.81% 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 4.2% 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.
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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
Every one of the 288 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. 288 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: 87.2% 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 route86.3%
- Delta Air Lines 1611 on the same route86.9%
- Delta Air Lines 1467 on the same route76.3%
- Delta Air Lines 2375 on the same route90.3%
- Delta Air Lines 2053 on the same route73.9%
- Delta Air Lines 1228 on the same route81.0%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.