Flight number record

DL 3012

Delta Air Lines · Atlanta to Birmingham

Route: ATL → BHM
Departs: 12:15
Flights: 351
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 3012, check with Delta Air Lines.

DL 3012 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 11 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 351 flights, with a median arrival 10 minutes early.

Set against the rest of the country, DL 3012's record is 11 points better than the US average of 77.6%. That gap is worth roughly 107 fewer late arrivals for every thousand flights.

On time

88.3%

Arrivals under 15 minutes late, of 349 completed flights

Avg delay

72 min

Across delayed arrivals only, not all flights

Cancelled

0.57%

National rate is 1.81%

1 hour+ late

3.7%

National rate is 8.1%

These figures cover 351 flights between July 2025 and June 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.

Schedule

When DL 3012 flies

DL 3012 flies ATL to BHM without a single fixed slot. Its most common scheduled departure was 12:15, used on 64 of 351 flights, with 12:21 (39 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 12:1564 flights18.2%
Departs 12:2139 flights11.1%

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 12:15 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 3012 runs 10 points better at 88.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 3012 next to ATL to BHM

Every carrier on ATL to BHM combined arrived on time 84.0% of the time across 3,306 flights, so DL 3012 is 4 points ahead of it. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 7 points.

DL 3012 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 3012thin sample	351	88.3%	72 min	0.57%	A+
All Delta Air Lines on ATL–BHM	3,306	84.0%	64 min	1.72%	B
All carriers on ATL–BHM	3,306	84.0%	64 min	1.72%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 3012 quarter by quarter

Quarter by quarter DL 3012 held fairly steady: 92.9% in Jul–Sep 2025, 92.1% in Oct–Dec 2025, 83.5% in Jan–Mar 2026 and 84.6% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202585 flights92.9%
Oct–Dec 202589 flights92.1%
Jan–Mar 202686 flights83.5%
Apr–Jun 202691 flights84.6%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 3012 ranged from 82.4% on Monday to 94.1% on Thursday. With about 50 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 3012 runs late

One category carries most of the weight here. Carrier accounts for 60% of the 2,950 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.

Carrier
60%
Late-arriving aircraft
20%
Extreme weather
13%
National Airspace System
8%

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 2.0 times the usual weather exposure. The split is drawn from 2,950 delay minutes reported on DL 3012.

Cancellations are rare at 0.57%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is 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 3.7% 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.

DL 3012 is not only a ATL to BHM flight. It also flew BHM to ATL (350 flights, 89.1% 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. 351 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 3012
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
BHM to ATLthin sample	350	89.1%	88 min	0.57%	A+

What to do with this

Booking DL 3012

For a booking, DL 3012 has one of the better records a US domestic flight can show: 88.3% on time and 0.57% cancelled. That is a base rate, not a promise about any single day.

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