Flight number record
DL 2334
Delta Air Lines · Atlanta to Buffalo
- Route
- ATL → BUF
- Departs
- 21:52
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2334, check with Delta Air Lines.
DL 2334 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 365 flights, with a median arrival 1 minute early.
Key figures
On time
74.0%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
1.92%
National rate is 1.89%
1 hour+ late
8.9%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. Beyond the headline rate, 8.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2334 flies
DL 2334 flies ATL to BUF without a single fixed slot. Its most common scheduled departure was 21:52, used on 52 of 365 flights, with 21:30 (43 flights) next.
- Departs 21:5252 flights14.2%
- Departs 21:3043 flights11.8%
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 21:52 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 2334 runs 4 points better at 74.0%. 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 2334 next to ATL to BUF
Every carrier on ATL to BUF combined arrived on time 76.9% of the time across 1,534 flights, so DL 2334 is 3 points behind it. Delta flew 1,255 flights on the same city pair under all its flight numbers, including this one, and those ran 79.1% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2334 | 365 | 74.0% | 61 min | 1.92% | C |
| All Delta Air Lines on ATL–BUF | 1,255 | 79.1% | 55 min | 1.75% | B |
| All carriers on ATL–BUF | 1,534 | 76.9% | 63 min | 1.89% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2334 quarter by quarter
DL 2334 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 55.7%, a swing of 41 points on roughly 73 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 202592 flights74.2%
- Jan–Mar 202690 flights78.7%
- Apr–Jun 202691 flights74.2%
- Jul–Sep 202662 flights55.7%
Scale runs 45% to 100%.
By weekday, DL 2334 did best on Wednesday at 88.5% on time and worst on Friday at 66.7%. Each day rests on about 52 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2334 runs when it is late
The 93 late arrivals split 35 under half an hour, 26 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early43 flights12.0%
- Within 15 min222 flights62.0%
- 15–29 min late35 flights9.8%
- 30–59 min late26 flights7.3%
- 1–2 hours late26 flights7.3%
- 2+ hours late6 flights1.7%
Scale runs 0% to 100%.
Share of 358 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 84 departures that left 15 minutes late or more, only 9 made it up before arrival. In the other direction, 18 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at BUF.
The worst days
Worst days for DL 2334
The latest arrival of the period was on 17 February 2026, 12 hours 5 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across February, December, January, March and October, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 February 2026 | 12 hours 5 minutes | Extreme weather |
| 7 December 2025 | 3 hours 7 minutes | Late-arriving aircraft |
| 24 January 2026 | 3 hours 4 minutes | Carrier |
| 6 March 2026 | 2 hours 50 minutes | Late-arriving aircraft |
| 10 October 2025 | 2 hours 43 minutes | Carrier |
Delay causes
Why DL 2334 runs late
Late-arriving aircraft accounts for 42% of the 5,647 delay minutes carriers reported here, and the remaining four split what is left.
- 42%Late-arriving aircraft
- 31%Carrier
- 16%Extreme weather
- 11%National Airspace System
Extreme weather accounts for 16% 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 2.6 times the usual weather exposure. The split is drawn from 5,647 delay minutes reported on DL 2334.
Cancellations sit at 1.92% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
8.9% 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 about an hour, which a normal layover absorbs.
The 712 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.
Every one of the 365 flights under DL 2334 in the data flew ATL to BUF. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 365 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 2334
For a booking, read DL 2334 as 74.0% on time with 1.92% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to BUF, every carrier and departure
- BUF to ATL, the return direction
- Delta Air Lines 1384 on the same route87.1%
- Delta Air Lines 2050 on the same route73.6%
- 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
- Why the first flight of the morning is statistically safest
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.