Flight number record

DL 363

Delta Air Lines · San Francisco to New York

Route: SFO → JFK
Departs: 16:10
Flights: 270
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 363, check with Delta Air Lines.

DL 363 lands a B, about a point worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 270 flights, with a median arrival 9 minutes early.

On time

76.6%

Arrivals under 15 minutes late, of 265 completed flights

Avg delay

70 min

Across delayed arrivals only, not all flights

Cancelled

1.48%

National rate is 1.81%

1 hour+ late

10.2%

National rate is 8.1%

These figures cover 270 flights between July 2025 and June 2026. Beyond the headline rate, 10.2% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When DL 363 flies

DL 363 flies SFO to JFK without a single fixed slot. Its most common scheduled departure was 16:10, used on 74 of 270 flights, with 16:05 (66 flights) and 16:00 (57 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:1074 flights27.4%
Departs 16:0566 flights24.4%
Departs 16:0057 flights21.1%

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 16:10 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 363 runs 4 points better at 76.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 363 next to SFO to JFK

Every carrier on SFO to JFK combined arrived on time 80.1% of the time across 6,729 flights, so DL 363 is 4 points behind it. Delta flew 2,229 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 81.6%, which this flight trails by 5 points.

DL 363 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 363thin sample	270	76.6%	70 min	1.48%	B
All Delta Air Lines on SFO–JFK	2,229	79.9%	69 min	1.57%	B
All carriers on SFO–JFK	6,729	80.1%	78 min	1.98%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 363 quarter by quarter

DL 363 did not run the same all year. Its best quarter was Jul–Sep 2025 at 83.1% on time and its weakest Apr–Jun 2026 at 71.9%, a swing of 11 points on roughly 68 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 202578 flights83.1%
Oct–Dec 202574 flights75.0%
Jan–Mar 202661 flights74.6%
Apr–Jun 202657 flights71.9%

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

By weekday, DL 363 did best on Tuesday at 87.5% on time and worst on Sunday at 64.4%. Each day rests on about 39 flights, so a gap of 23 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 363 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 56% of the 4,367 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.

Late-arriving aircraft
56%
Carrier
28%
National Airspace System
16%

56% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 4,367 reported delay minutes here, that single category outweighs weather by 56 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 4,367 delay minutes reported on DL 363.

Cancellations sit at 1.48% against a national 1.81%, which is ordinary. Diversions add another 0.37%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.2% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

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.

DL 363 is not only a SFO to JFK flight. It also flew JFK to SFO (264 flights, 77.5% 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. 270 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 363
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
JFK to SFOthin sample	264	77.5%	66 min	0.38%	B+

What to do with this

Booking DL 363

For a booking, read DL 363 as 76.6% on time with 1.48% cancelled over 270 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