Flight number record
DL 2152
Delta Air Lines · Atlanta to Milwaukee
- Route
- ATL → MKE
- Departs
- 16:38
- Flights
- 297
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2152, check with Delta Air Lines.
DL 2152 lands a B−, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by roughly 50 minutes on average. That rests on 297 flights, with a median arrival 4 minutes early.
Set against the rest of the country, DL 2152's record is 6 points better than the US average of 77.3%. That gap is worth roughly 63 fewer late arrivals for every thousand flights.
Key figures
On time
83.6%
Arrivals under 15 minutes late, of 287 completed flights
Avg delay
48 min
Across delayed arrivals only, not all flights
Cancelled
3.03%
National rate is 1.89%
1 hour+ late
3.5%
National rate is 8.3%
These figures cover 297 flights between September 2025 and August 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.
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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 297 flights, with 14:05 (35 flights) next.
- Departs 16:3841 flights13.8%
- Departs 14:0535 flights11.8%
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 16:38 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 2152 runs 12 points better at 83.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 2152 next to ATL to MKE
Every carrier on ATL to MKE combined arrived on time 82.8% of the time across 2,264 flights, so DL 2152 is about level with it. Delta flew 2,202 flights on the same city pair under all its flight numbers, including this one, and those ran 83.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2152thin sample | 297 | 83.6% | 48 min | 3.03% | B− |
| All Delta Air Lines on ATL–MKE | 2,202 | 83.7% | 53 min | 1.95% | B |
| All carriers on ATL–MKE | 2,264 | 82.8% | 53 min | 1.90% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | 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 74 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 202513 flights—
- Oct–Dec 202576 flights82.7%
- Jan–Mar 202686 flights77.5%
- Apr–Jun 202681 flights91.1%
- Jul–Sep 202641 flights82.5%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2152 ranged from 78.7% on Sunday to 88.2% on Saturday. With about 42 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 2152 runs when it is late
The 47 late arrivals split 16 under half an hour, 21 between 30 and 60 minutes, and 10 an hour or more.
- 15+ min early28 flights9.8%
- Within 15 min212 flights73.9%
- 15–29 min late16 flights5.6%
- 30–59 min late21 flights7.3%
- 1–2 hours late5 flights1.7%
- 2+ hours late5 flights1.7%
Scale runs 0% to 100%.
Share of 287 completed flights by arrival against schedule.
8 of 45 late departures made up the time and arrived on time, 18% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for DL 2152
The latest arrival of the period was on 3 November 2025, 2 hours 47 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 November 2025 | 2 hours 47 minutes | Carrier |
| 12 March 2026 | 2 hours 18 minutes | Carrier |
| 28 April 2026 | 2 hours 18 minutes | Late-arriving aircraft |
| 12 July 2026 | 2 hours 11 minutes | Carrier |
| 21 September 2025 | 2 hours 7 minutes | Carrier |
Delay causes
Why DL 2152 runs late
Carrier accounts for 49% of the 2,275 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Carrier
- 23%Late-arriving aircraft
- 20%National Airspace System
- 7%Extreme weather
The largest share of delay minutes, 49%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,120 of the 2,275 delay minutes reported here. The split is drawn from 2,275 delay minutes reported on DL 2152.
Cancellations run at 3.03%, against 1.89% nationally. That is roughly 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 3.5% 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 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.
DL 2152 is not only a ATL to MKE flight. It also flew MKE to ATL (295 flights, 86.7% 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. 297 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 | 295 | 86.7% | 103 min | 3.05% | A− |
What to do with this
Booking DL 2152
For a booking, the cancellation rate is the figure to plan around on DL 2152: 3.03% of its 297 scheduled flights did not operate. A late arrival costs roughly 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 route80.9%
- Delta Air Lines 2999 on the same route91.6%
- Delta Air Lines 1151 on the same route88.6%
- Delta Air Lines 1206 on the same route74.4%
- Delta Air Lines 1246 on the same route89.4%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Milwaukee Mitchell International (MKE) 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.