Flight number record

DL 2334

Delta Air Lines · Atlanta to Buffalo

Route: ATL → BUF
Departs: 21:30
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2334, check with Delta Air Lines.

DL 2334 lands a B, level with the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 365 flights, with a median arrival 4 minutes early.

On time

77.9%

Arrivals under 15 minutes late, of 357 completed flights

Avg delay

59 min

Across delayed arrivals only, not all flights

Cancelled

2.19%

National rate is 1.81%

1 hour+ late

7.0%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 4 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 2334 flies

DL 2334 flies ATL to BUF without a single fixed slot. Its most common scheduled departure was 21:30, used on 43 of 365 flights, with 21:47 (39 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:3043 flights11.8%
Departs 21:4739 flights10.7%

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 21:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 2334 runs 7 points better at 77.9%. 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 2334 next to ATL to BUF

Every carrier on ATL to BUF combined arrived on time 79.0% of the time across 1,508 flights, so DL 2334 is about level with it. Delta flew 1,250 flights on the same city pair under all its flight numbers, including this one, and those ran 81.2% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 4 points.

DL 2334 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2334	365	77.9%	59 min	2.19%	B
All Delta Air Lines on ATL–BUF	1,250	81.2%	51 min	1.84%	B
All carriers on ATL–BUF	1,508	79.0%	58 min	1.92%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 84.4% on time and its weakest Apr–Jun 2026 at 74.2%, a swing of 10 points on roughly 91 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 202592 flights84.4%
Oct–Dec 202592 flights74.2%
Jan–Mar 202690 flights78.7%
Apr–Jun 202691 flights74.2%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2334 did best on Thursday at 86.0% on time and worst on Sunday at 74.0%. Each day rests on about 52 flights, so a gap of 12 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2334 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 4,679 reported delay minutes.

Late-arriving aircraft
37%
Carrier
34%
Extreme weather
19%
National Airspace System
11%

Extreme weather accounts for 19% 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 3.1 times the usual weather exposure. The split is drawn from 4,679 delay minutes reported on DL 2334.

Cancellations sit at 2.19% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

7.0% 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 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

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 77.9% on time with 2.19% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular 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