Flight number record

DL 2999

Delta Air Lines · Atlanta to Milwaukee

Route: ATL → MKE
Departs: 08:05
Flights: 357
Period: September 2025 to August 2026

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

DL 2999 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 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 50 minutes. That rests on 357 flights, with a median arrival 10 minutes early.

Set against the rest of the country, DL 2999's record is 14 points better than the US average of 77.3%. That gap is worth roughly 143 fewer late arrivals for every thousand flights.

On time

91.6%

Arrivals under 15 minutes late, of 346 completed flights

Avg delay

50 min

Across delayed arrivals only, not all flights

Cancelled

3.08%

National rate is 1.89%

1 hour+ late

2.0%

National rate is 8.3%

These figures cover 357 flights between September 2025 and August 2026. The median arrival is 10 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 2999 flies

DL 2999 flies ATL to MKE without a single fixed slot. Its most common scheduled departure was 08:05, used on 124 of 357 flights, with 08:10 (61 flights) and 08:27 (50 flights) next.

Departs 08:05124 flights34.7%
Departs 08:1061 flights17.1%
Departs 08:2750 flights14.0%

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 08:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 2999 runs 8 points better at 91.6%. 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 2999 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 2999 is 9 points ahead of 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 11 points.

DL 2999 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2999thin sample	357	91.6%	50 min	3.08%	A−
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 2999 quarter by quarter

Quarter by quarter DL 2999 held fairly steady: 90.0% in Jul–Sep 2025, 90.9% in Oct–Dec 2025, 87.2% in Jan–Mar 2026, 95.5% in Apr–Jun 2026 and 93.4% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202530 flights90.0%
Oct–Dec 202592 flights90.9%
Jan–Mar 202682 flights87.2%
Apr–Jun 202691 flights95.5%
Jul–Sep 202662 flights93.4%

Scale runs 80% to 100%.

By weekday, DL 2999 did best on Friday at 96.1% on time and worst on Sunday at 80.9%. Each day rests on about 51 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 2999 runs when it is late

DL 2999 often beats the schedule: 98 of 346 completed flights, 28%, arrived 15 minutes or more early. The 29 late arrivals split 11 under half an hour, 11 between 30 and 60 minutes, and 7 an hour or more.

15+ min early98 flights28.3%
Within 15 min219 flights63.3%
15–29 min late11 flights3.2%
30–59 min late11 flights3.2%
1–2 hours late5 flights1.4%
2+ hours late2 flights0.6%

Scale runs 0% to 100%.

Share of 346 completed flights by arrival against schedule.

6 of 25 late departures made up the time and arrived on time, 24% of them. 10 flights left on time and still arrived late.

The worst days

Worst days for DL 2999

The latest arrival of the period was on 26 January 2026, 4 hours 14 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.

The latest arrivals of DL 2999 in the period
Date	Arrived late by	Largest filed cause
26 January 2026	4 hours 14 minutes	Carrier
21 June 2026	2 hours 41 minutes	Carrier
17 March 2026	1 hour 41 minutes	Carrier
10 December 2025	1 hour 27 minutes	National Airspace System
11 January 2026	1 hour 15 minutes	Carrier

Delay causes

Why DL 2999 runs late

Carrier accounts for 69% of the 1,447 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
69%
National Airspace System
23%
Late-arriving aircraft
6%
Extreme weather
2%

The largest share of delay minutes, 69%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 998 of the 1,447 delay minutes reported here. The split is drawn from 1,447 delay minutes reported on DL 2999.

Cancellations run at 3.08%, 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 2.0% 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 2999 is not only a ATL to MKE flight. It also flew MKE to ATL (357 flights, 95.1% 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. 357 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
MKE to ATLthin sample	357	95.1%	63 min	3.08%	A−

What to do with this

Booking DL 2999

For a booking, the cancellation rate is the figure to plan around on DL 2999: 3.08% of its 357 scheduled flights did not operate. A late arrival costs about 50 minutes, 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures