Flight number record

DL 2034

Delta Air Lines · Atlanta to Birmingham

Route: ATL → BHM
Departs: 23:00
Flights: 324
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2034, check with Delta Air Lines.

DL 2034 lands a B, 4 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 324 flights, with a median arrival 7 minutes early.

On time

81.3%

Arrivals under 15 minutes late, of 315 completed flights

Avg delay

77 min

Across delayed arrivals only, not all flights

Cancelled

2.78%

National rate is 1.81%

1 hour+ late

7.3%

National rate is 8.1%

These figures cover 324 flights between July 2025 and June 2026. The median arrival is 7 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 2034 flies

DL 2034 flies ATL to BHM without a single fixed slot. Its most common scheduled departure was 23:00, used on 89 of 324 flights, with 22:59 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 23:0089 flights27.5%
Departs 22:5937 flights11.4%

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 23:00 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 2034 runs 11 points better at 81.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 2034 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 2034 is 3 points behind it. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 2034 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2034thin sample	324	81.3%	77 min	2.78%	B
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 2034 quarter by quarter

DL 2034 did not run the same all year. Its best quarter was Apr–Jun 2026 at 88.4% on time and its weakest Jan–Mar 2026 at 75.9%, a swing of 13 points on roughly 81 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 202581 flights81.5%
Oct–Dec 202566 flights78.5%
Jan–Mar 202686 flights75.9%
Apr–Jun 202691 flights88.4%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2034 did best on Saturday at 91.1% on time and worst on Sunday at 65.1%. Each day rests on about 46 flights, so a gap of 26 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2034 runs late

One category carries most of the weight here. Carrier accounts for 58% of the 4,541 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
58%
Late-arriving aircraft
17%
National Airspace System
14%
Extreme weather
11%

Extreme weather accounts for 11% 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 1.8 times the usual weather exposure. The split is drawn from 4,541 delay minutes reported on DL 2034.

Cancellations run at 2.78%, 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

7.3% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

The same number turns up on one other city pair in the data, including ATL to AGS (9), but none flew often enough under DL 2034 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to BHM only.

One caution: this is a thin sample. 324 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.

What to do with this

Booking DL 2034

For a booking, the cancellation rate is the figure to plan around on DL 2034: 2.78% of its 324 scheduled flights did not operate. A late arrival costs a little over 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