Flight number record

DL 2664

Delta Air Lines · Buffalo to Atlanta

Route: BUF → ATL
Departs: 06:00
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2664, check with Delta Air Lines.

DL 2664 earns an A. 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 77.6%. When something does go wrong the average delay runs about an hour. That rests on 365 flights, with a median arrival 8 minutes early.

Set against the rest of the country, DL 2664's record is 8 points better than the US average of 77.6%. That gap is worth roughly 80 fewer late arrivals for every thousand flights.

On time

85.6%

Arrivals under 15 minutes late, of 355 completed flights

Avg delay

57 min

Across delayed arrivals only, not all flights

Cancelled

2.47%

National rate is 1.81%

1 hour+ late

3.1%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 8 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 2664 flies

DL 2664 is scheduled to leave Buffalo (BUF) at 06:00 local time and reach Atlanta (ATL) at 08:05. That slot held for 311 of the 365 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.

Departs 06:00311 flights85.2%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 2664 runs 4 points worse at 85.6%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 2664 next to BUF to ATL

Every carrier on BUF to ATL combined arrived on time 81.5% of the time across 1,507 flights, so DL 2664 is 4 points ahead of it. Delta flew 1,249 flights on the same city pair under all its flight numbers, including this one, and those ran 84.0% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 4 points.

DL 2664 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2664	365	85.6%	57 min	2.47%	A
All Delta Air Lines on BUF–ATL	1,249	84.0%	60 min	2.00%	B
All carriers on BUF–ATL	1,507	81.5%	66 min	2.12%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2664 quarter by quarter

DL 2664 did not run the same all year. Its best quarter was Apr–Jun 2026 at 92.0% on time and its weakest Oct–Dec 2025 at 80.2%, a swing of 12 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 flights87.8%
Oct–Dec 202592 flights80.2%
Jan–Mar 202690 flights82.6%
Apr–Jun 202691 flights92.0%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2664 did best on Wednesday at 92.3% on time and worst on Sunday at 76.5%. Each day rests on about 52 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2664 runs late

One category carries most of the weight here. Carrier accounts for 65% of the 2,915 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
65%
National Airspace System
18%
Late-arriving aircraft
13%
Extreme weather
4%

The largest share of delay minutes, 65%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,881 of the 2,915 delay minutes reported here. The split is drawn from 2,915 delay minutes reported on DL 2664.

Cancellations sit at 2.47% against a national 1.81%, which is ordinary. Diversions add another 0.27%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.1% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

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 2664 in the data flew BUF to ATL. 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 2664

For a booking, read DL 2664 as 85.6% on time with 2.47% 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