Flight number record

DL 1444

Delta Air Lines · Washington to Atlanta

Route: IAD → ATL
Departs: 12:37
Flights: 251
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1444, check with Delta Air Lines.

DL 1444 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 an hour and a half on average. That rests on 251 flights, with a median arrival 10 minutes early.

On time

80.3%

Arrivals under 15 minutes late, of 239 completed flights

Avg delay

82 min

Across delayed arrivals only, not all flights

Cancelled

3.19%

National rate is 1.89%

1 hour+ late

5.9%

National rate is 8.3%

These figures cover 251 flights between September 2025 and August 2026. The median arrival is 10 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 1444 flies

DL 1444 flies IAD to ATL without a single fixed slot. Its most common scheduled departure was 12:37, used on 68 of 251 flights, with 12:47 (34 flights) and 12:40 (29 flights) next.

Departs 12:3768 flights27.1%
Departs 12:4734 flights13.5%
Departs 12:4029 flights11.6%

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 12:37 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 1444 runs 2 points better at 80.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

DL 1444 next to IAD to ATL

Every carrier on IAD to ATL combined arrived on time 78.0% of the time across 4,003 flights, so DL 1444 is 2 points ahead of it. Delta flew 2,233 flights on the same city pair under all its flight numbers, including this one, and those ran 79.9% on time. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.

DL 1444 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1444thin sample	251	80.3%	82 min	3.19%	B−
All Delta Air Lines on IAD–ATL	2,233	79.9%	94 min	2.82%	B
All carriers on IAD–ATL	4,003	78.0%	86 min	2.32%	B
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 1444 quarter by quarter

DL 1444 did not run the same all year. Its best quarter was Apr–Jun 2026 at 83.7% on time and its weakest Jul–Sep 2026 at 66.7%, a swing of 17 points on roughly 84 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.

Oct–Dec 202512 flights—
Jan–Mar 202690 flights82.8%
Apr–Jun 202691 flights83.7%
Jul–Sep 202658 flights66.7%

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1444 did best on Wednesday at 88.9% on time and worst on Saturday at 68.8%. Each day rests on about 36 flights, so a gap of 20 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 1444 runs when it is late

DL 1444 often beats the schedule: 97 of 239 completed flights, 41%, arrived 15 minutes or more early. The 47 late arrivals split 16 under half an hour, 17 between 30 and 60 minutes, and 14 an hour or more.

15+ min early97 flights40.6%
Within 15 min95 flights39.7%
15–29 min late16 flights6.7%
30–59 min late17 flights7.1%
1–2 hours late5 flights2.1%
2+ hours late9 flights3.8%

Scale runs 0% to 100%.

Share of 239 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 35 departures that left 15 minutes late or more, only 3 made it up before arrival. In the other direction, 15 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 ATL.

The worst days

Worst days for DL 1444

The latest arrival of the period was on 25 July 2026, 16 hours 43 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across July, March, May and April, with no single month standing out.

The latest arrivals of DL 1444 in the period
Date	Arrived late by	Largest filed cause
25 July 2026	16 hours 43 minutes	Carrier
27 March 2026	3 hours 23 minutes	Late-arriving aircraft
2 May 2026	3 hours 1 minute	Late-arriving aircraft
18 April 2026	2 hours 59 minutes	Carrier
18 July 2026	2 hours 52 minutes	National Airspace System

Delay causes

Why DL 1444 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 3,853 reported delay minutes.

Carrier
42%
Late-arriving aircraft
39%
National Airspace System
20%

39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,853 reported delay minutes here, that single category outweighs weather by 39 to one. The split is drawn from 3,853 delay minutes reported on DL 1444.

Cancellations run at 3.19%, 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

5.9% 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 an hour and a half, which a normal layover absorbs.

The 534 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.

DL 1444 is not only a IAD to ATL flight. It also flew ATL to IAD (251 flights, 87.6% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 251 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.

Other routes flown as DL 1444
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
ATL to IADthin sample	251	87.6%	66 min	3.59%	A−

What to do with this

Booking DL 1444

For a booking, the cancellation rate is the figure to plan around on DL 1444: 3.19% of its 251 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.

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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures