Flight number record
DL 2152
Delta Air Lines · Atlanta to Milwaukee
- Route
- ATL → MKE
- Departs
- 16:38
- Flights
- 291
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2152, check with Delta Air Lines.
DL 2152 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 50 minutes. That rests on 291 flights, with a median arrival 5 minutes early.
Set against the rest of the country, DL 2152's record is 7 points better than the US average of 77.6%. That gap is worth roughly 67 fewer late arrivals for every thousand flights.
Key figures
On time
84.3%
Arrivals under 15 minutes late, of 281 completed flights
Avg delay
49 min
Across delayed arrivals only, not all flights
Cancelled
3.44%
National rate is 1.81%
1 hour+ late
2.5%
National rate is 8.1%
These figures cover 291 flights between July 2025 and June 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.
Schedule
When DL 2152 flies
DL 2152 flies ATL to MKE without a single fixed slot. Its most common scheduled departure was 16:38, used on 41 of 291 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 16:3841 flights14.1%
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 16:38 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 2152 runs 12 points better at 84.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
DL 2152 next to ATL to MKE
Every carrier on ATL to MKE combined arrived on time 83.4% of the time across 2,267 flights, so DL 2152 is about level with it. Delta flew 2,205 flights on the same city pair under all its flight numbers, including this one, and those ran 84.2% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2152thin sample | 291 | 84.3% | 49 min | 3.44% | B− |
| All Delta Air Lines on ATL–MKE | 2,205 | 84.2% | 51 min | 1.81% | B |
| All carriers on ATL–MKE | 2,267 | 83.4% | 51 min | 1.76% | B |
| Delta Air Lines, whole network | 1,038,570 | 81.6% | 71 min | 1.62% | B |
Across the year
DL 2152 quarter by quarter
DL 2152 did not run the same all year. Its best quarter was Apr–Jun 2026 at 91.1% on time and its weakest Jan–Mar 2026 at 77.5%, a swing of 14 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 202548 flights87.2%
- Oct–Dec 202576 flights82.7%
- Jan–Mar 202686 flights77.5%
- Apr–Jun 202681 flights91.1%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2152 did best on Friday at 90.9% on time and worst on Sunday at 78.7%. Each day rests on about 42 flights, so a gap of 12 points is worth noticing but could still narrow in another year.
Delay causes
Why DL 2152 runs late
One category carries most of the weight here. Carrier accounts for 49% of the 2,169 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.
- 49%Carrier
- 24%Late-arriving aircraft
- 14%National Airspace System
- 13%Extreme weather
Extreme weather accounts for 13% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.1 times the usual weather exposure. The split is drawn from 2,169 delay minutes reported on DL 2152.
Cancellations run at 3.44%, against 1.81% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.5% 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 669 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.
DL 2152 is not only a ATL to MKE flight. It also flew MKE to ATL (286 flights, 87.7% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 291 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| MKE to ATLthin sample | 286 | 87.7% | 116 min | 3.50% | A− |
What to do with this
Booking DL 2152
For a booking, the cancellation rate is the figure to plan around on DL 2152: 3.44% of its 291 scheduled flights did not operate. A late arrival costs about 50 minutes, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ATL to MKE, every carrier and departure
- MKE to ATL, the return direction
- Delta Air Lines 1268 on the same route81.2%
- Delta Air Lines 2999 on the same route91.6%
- Delta Air Lines 1151 on the same route89.6%
- Delta Air Lines 1206 on the same route74.5%
- Delta Air Lines 1246 on the same route87.8%
- 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
- What a cancellation rate actually tells you (and what it hides)
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.