Flight number record
DL 2043
Delta Air Lines · Atlanta to Tulsa
- Route
- ATL → TUL
- Departs
- 21:25
- Flights
- 349
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2043, check with Delta Air Lines.
DL 2043 earns a B−. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 349 flights, with a median arrival 11 minutes early.
Set against the rest of the country, DL 2043's record is 8 points better than the US average of 77.3%. That gap is worth roughly 75 fewer late arrivals for every thousand flights.
Key figures
On time
84.8%
Arrivals under 15 minutes late, of 336 completed flights
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
3.44%
National rate is 1.89%
1 hour+ late
5.7%
National rate is 8.3%
These figures cover 349 flights between September 2025 and August 2026. The median arrival is 11 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 2043 flies
DL 2043 flies ATL to TUL without a single fixed slot. Its most common scheduled departure was 21:25, used on 65 of 349 flights, with 21:15 (49 flights) and 22:18 (42 flights) next.
- Departs 21:2565 flights18.6%
- Departs 21:1549 flights14.0%
- Departs 22:1842 flights12.0%
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 21:25 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 2043 runs 15 points better at 84.8%. 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 2043 next to ATL to TUL
Every carrier on ATL to TUL combined arrived on time 84.3% of the time across 1,573 flights, so DL 2043 is about level with it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2043thin sample | 349 | 84.8% | 82 min | 3.44% | B− |
| All Delta Air Lines on ATL–TUL | 1,573 | 84.3% | 72 min | 2.29% | B |
| All carriers on ATL–TUL | 1,573 | 84.3% | 72 min | 2.29% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2043 quarter by quarter
DL 2043 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jul–Sep 2026 at 73.8%, a swing of 23 points on roughly 70 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 202530 flights96.7%
- Oct–Dec 202580 flights85.5%
- Jan–Mar 202686 flights84.1%
- Apr–Jun 202691 flights88.5%
- Jul–Sep 202662 flights73.8%
Scale runs 65% to 100%.
By weekday, DL 2043 did best on Wednesday at 92.0% on time and worst on Saturday at 76.6%. Each day rests on about 50 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2043 runs when it is late
DL 2043 often beats the schedule: 128 of 336 completed flights, 38%, arrived 15 minutes or more early. The 51 late arrivals split 17 under half an hour, 15 between 30 and 60 minutes, and 19 an hour or more.
- 15+ min early128 flights38.1%
- Within 15 min157 flights46.7%
- 15–29 min late17 flights5.1%
- 30–59 min late15 flights4.5%
- 1–2 hours late12 flights3.6%
- 2+ hours late7 flights2.1%
Scale runs 0% to 100%.
Share of 336 completed flights by arrival against schedule.
10 of 51 late departures made up the time and arrived on time, 20% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for DL 2043
The latest arrival of the period was on 8 December 2025, 13 hours 8 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 8 December 2025 | 13 hours 8 minutes | Carrier |
| 4 October 2025 | 10 hours 11 minutes | Carrier |
| 11 July 2026 | 3 hours 14 minutes | Late-arriving aircraft |
| 29 May 2026 | 2 hours 25 minutes | Late-arriving aircraft |
| 11 August 2026 | 2 hours 20 minutes | Late-arriving aircraft |
Delay causes
Why DL 2043 runs late
Carrier accounts for 64% of the 4,195 delay minutes carriers reported here, and the remaining four split what is left.
- 64%Carrier
- 22%Late-arriving aircraft
- 12%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 64%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,672 of the 4,195 delay minutes reported here. The split is drawn from 4,195 delay minutes reported on DL 2043.
Cancellations run at 3.44%, against 1.89% nationally. That is about 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
5.7% 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 an hour and a half, which a normal layover absorbs.
The 674 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.
The same number turns up on one other city pair in the data, including RSW to DTW (12), but none flew often enough under DL 2043 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to TUL only.
One caution: this is a thin sample. 349 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 2043
For a booking, the cancellation rate is the figure to plan around on DL 2043: 3.44% of its 349 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ATL to TUL, every carrier and departure
- TUL to ATL, the return direction
- Delta Air Lines 2754 on the same route91.0%
- Delta Air Lines 2620 on the same route84.6%
- 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.