Flight number record
DL 2034
Delta Air Lines · Atlanta to Birmingham
- Route
- ATL → BHM
- Departs
- 23:00
- Flights
- 326
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2034, check with Delta Air Lines.
DL 2034 lands a B, 3 points better than the national rate of 77.3%. 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 rests on 326 flights, with a median arrival 6 minutes early.
Key figures
On time
80.1%
Arrivals under 15 minutes late, of 317 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
2.76%
National rate is 1.89%
1 hour+ late
6.3%
National rate is 8.3%
These figures cover 326 flights between September 2025 and August 2026. The median arrival is 6 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 2034 flies
DL 2034 flies ATL to BHM without a single fixed slot. Its most common scheduled departure was 23:00, used on 90 of 326 flights, with 23:05 (74 flights) and 22:59 (36 flights) next.
- Departs 23:0090 flights27.6%
- Departs 23:0574 flights22.7%
- Departs 22:5936 flights11.0%
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 23:00 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 2034 runs 10 points better at 80.1%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 2034 next to ATL to BHM
Every carrier on ATL to BHM combined arrived on time 83.1% of the time across 3,371 flights, so DL 2034 is 3 points behind it. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2034thin sample | 326 | 80.1% | 69 min | 2.76% | B |
| All Delta Air Lines on ATL–BHM | 3,371 | 83.1% | 64 min | 1.69% | B |
| All carriers on ATL–BHM | 3,371 | 83.1% | 64 min | 1.69% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | 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 Jul–Sep 2026 at 72.6%, a swing of 16 points on roughly 82 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 202521 flights—
- Oct–Dec 202566 flights78.5%
- Jan–Mar 202686 flights75.9%
- Apr–Jun 202691 flights88.4%
- Jul–Sep 202662 flights72.6%
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2034 did best on Tuesday at 89.4% on time and worst on Sunday at 63.6%. Each day rests on about 47 flights, so a gap of 26 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2034 runs when it is late
The 63 late arrivals split 20 under half an hour, 23 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early73 flights23.0%
- Within 15 min181 flights57.1%
- 15–29 min late20 flights6.3%
- 30–59 min late23 flights7.3%
- 1–2 hours late15 flights4.7%
- 2+ hours late5 flights1.6%
Scale runs 0% to 100%.
Share of 317 completed flights by arrival against schedule.
9 of 64 late departures made up the time and arrived on time, 14% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for DL 2034
The latest arrival of the period was on 12 September 2025, 10 hours 11 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across September, May, November, October and December, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 12 September 2025 | 10 hours 11 minutes | Carrier |
| 26 May 2026 | 8 hours 14 minutes | Carrier |
| 8 November 2025 | 4 hours 28 minutes | National Airspace System |
| 10 October 2025 | 2 hours 13 minutes | Late-arriving aircraft |
| 7 December 2025 | 2 hours 11 minutes | Extreme weather |
Delay causes
Why DL 2034 runs late
Carrier accounts for 62% of the 4,324 delay minutes carriers reported here, and the remaining four split what is left.
- 62%Carrier
- 16%Late-arriving aircraft
- 13%National Airspace System
- 9%Extreme weather
The largest share of delay minutes, 62%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,685 of the 4,324 delay minutes reported here. The split is drawn from 4,324 delay minutes reported on DL 2034.
Cancellations run at 2.76%, against 1.89% 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
6.3% of arrivals land an hour or more late, close to the national 8.3%, so 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. 326 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: 2.76% of its 326 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.
Related
Where to go next
- ATL to BHM, every carrier and departure
- BHM to ATL, the return direction
- Delta Air Lines 3012 on the same route86.8%
- Delta Air Lines 2484 on the same route79.2%
- Delta Air Lines 3100 on the same route92.1%
- Delta Air Lines 3164 on the same route89.8%
- Hartsfield-Jackson Atlanta International (ATL) 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.