Flight number record

DL 383

Delta Air Lines · San Francisco to New York

Route: SFO → JFK
Departs: 09:00
Flights: 350
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s DL 383, check with Delta Air Lines.

DL 383 earns an A−. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 350 flights, with a median arrival 15 minutes early.

Set against the rest of the country, DL 383's record is 10 points better than the US average of 77.3%. That gap is worth roughly 98 fewer late arrivals for every thousand flights.

On time

87.1%

Arrivals under 15 minutes late, of 334 completed flights

Avg delay

77 min

Across delayed arrivals only, not all flights

Cancelled

3.43%

National rate is 1.89%

1 hour+ late

3.3%

National rate is 8.3%

These figures cover 350 flights between September 2025 and August 2026. The median arrival is 15 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 383 flies

DL 383 flies SFO to JFK without a single fixed slot. Its most common scheduled departure was 09:00, used on 76 of 350 flights, with 09:10 (47 flights) and 09:35 (44 flights) next.

Departs 09:0076 flights21.7%
Departs 09:1047 flights13.4%
Departs 09:3544 flights12.6%

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 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 383 runs 3 points better at 87.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

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Against the route

DL 383 next to SFO to JFK

Every carrier on SFO to JFK combined arrived on time 78.0% of the time across 6,798 flights, so DL 383 is 9 points ahead of it. Delta flew 2,230 flights on the same city pair under all its flight numbers, including this one, and those ran 77.2% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 6 points.

DL 383 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 383thin sample	350	87.1%	77 min	3.43%	A−
All Delta Air Lines on SFO–JFK	2,230	77.2%	71 min	2.15%	B
All carriers on SFO–JFK	6,798	78.0%	80 min	2.49%	B
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 383 quarter by quarter

Quarter by quarter DL 383 held fairly steady: 90.0% in Jul–Sep 2025, 90.1% in Oct–Dec 2025, 89.7% in Jan–Mar 2026, 82.0% in Apr–Jun 2026 and 83.8% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202530 flights90.0%
Oct–Dec 202592 flights90.1%
Jan–Mar 202690 flights89.7%
Apr–Jun 202691 flights82.0%
Jul–Sep 202647 flights83.8%

Scale runs 75% to 95%.

By weekday, DL 383 did best on Friday at 91.7% on time and worst on Monday at 75.0%. Each day rests on about 50 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 383 runs when it is late

DL 383 often beats the schedule: 174 of 334 completed flights, 52%, arrived 15 minutes or more early. The 43 late arrivals split 21 under half an hour, 11 between 30 and 60 minutes, and 11 an hour or more.

15+ min early174 flights52.1%
Within 15 min117 flights35.0%
15–29 min late21 flights6.3%
30–59 min late11 flights3.3%
1–2 hours late6 flights1.8%
2+ hours late5 flights1.5%

Scale runs 0% to 100%.

Share of 334 completed flights by arrival against schedule.

A late pushback is often recovered here: of 32 departures that left 15 minutes late or more, 13 still arrived on time. In the other direction, 24 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 JFK.

The worst days

Worst days for DL 383

The latest arrival of the period was on 19 January 2026, 9 hours 41 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.

The latest arrivals of DL 383 in the period
Date	Arrived late by	Largest filed cause
19 January 2026	9 hours 41 minutes	Carrier
30 October 2025	5 hours 48 minutes	National Airspace System
30 May 2026	5 hours 10 minutes	Carrier
31 October 2025	4 hours 50 minutes	Carrier
31 December 2025	4 hours 4 minutes	Carrier

Delay causes

Why DL 383 runs late

Carrier accounts for 50% of the 3,297 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
50%
National Airspace System
40%
Late-arriving aircraft
7%
Extreme weather
3%

The largest share of delay minutes, 50%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,635 of the 3,297 delay minutes reported here. The split is drawn from 3,297 delay minutes reported on DL 383.

Cancellations run at 3.43%, 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

Badly late arrivals are rare here: only 3.3% land an hour or more behind schedule, against 8.3% 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.

At 2,586 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

Every one of the 350 flights under DL 383 in the data flew SFO to JFK. 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. 350 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 383

For a booking, the cancellation rate is the figure to plan around on DL 383: 3.43% of its 350 scheduled flights did not operate. A late arrival costs a little over an hour, 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