Flight number record

DL 2999

Delta Air Lines · Milwaukee to Atlanta

Route: MKE → ATL
Departs: 10:08
Flights: 355
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2999, check with Delta Air Lines.

DL 2999 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 18 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 355 flights, with a median arrival 18 minutes early.

Set against the rest of the country, DL 2999's record is 18 points better than the US average of 77.6%. That gap is worth roughly 175 fewer late arrivals for every thousand flights.

On time

95.1%

Arrivals under 15 minutes late, of 345 completed flights

Avg delay

67 min

Across delayed arrivals only, not all flights

Cancelled

2.82%

National rate is 1.81%

1 hour+ late

1.7%

National rate is 8.1%

These figures cover 355 flights between July 2025 and June 2026. The median arrival is 18 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 2999 flies

DL 2999 flies MKE to ATL without a single fixed slot. Its most common scheduled departure was 10:08, used on 54 of 355 flights, with 10:10 (46 flights) and 10:13 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:0854 flights15.2%
Departs 10:1046 flights13.0%
Departs 10:1337 flights10.4%

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 10:08 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 2999 runs 11 points better at 95.1%. 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 2999 next to MKE to ATL

Every carrier on MKE to ATL combined arrived on time 89.4% of the time across 2,267 flights, so DL 2999 is 6 points ahead of it. Delta flew 2,205 flights on the same city pair under all its flight numbers, including this one, and those ran 90.0% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 14 points.

DL 2999 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2999thin sample	355	95.1%	67 min	2.82%	A
All Delta Air Lines on MKE–ATL	2,205	90.0%	96 min	1.90%	A
All carriers on MKE–ATL	2,267	89.4%	92 min	1.90%	A
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2999 quarter by quarter

Quarter by quarter DL 2999 held fairly steady: 94.4% in Jul–Sep 2025, 95.5% in Oct–Dec 2025, 93.6% in Jan–Mar 2026 and 96.6% in Apr–Jun 2026. A spread of 3 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202590 flights94.4%
Oct–Dec 202592 flights95.5%
Jan–Mar 202682 flights93.6%
Apr–Jun 202691 flights96.6%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2999 ranged from 91.3% on Sunday to 98.0% on Friday. With about 51 flights behind each day, a spread of 7 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 2999 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 59% of the 1,142 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.

Late-arriving aircraft
59%
Carrier
31%
National Airspace System
9%
Extreme weather
0%

59% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 1,142 reported delay minutes here, that single category outweighs weather by 59 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 1,142 delay minutes reported on DL 2999.

Cancellations run at 2.82%, against 1.81% nationally. That is roughly one flight in 40 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 1.7% 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 2999 is not only a MKE to ATL flight. It also flew ATL to MKE (355 flights, 91.6% 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. 355 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.

Other routes flown as DL 2999
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
ATL to MKEthin sample	355	91.6%	50 min	2.82%	A

What to do with this

Booking DL 2999

For a booking, the cancellation rate is the figure to plan around on DL 2999: 2.82% of its 355 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.

Where to go next

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.

Key figures