Flight number record
DL 363
Delta Air Lines · New York to San Francisco
- Route
- JFK → SFO
- Departs
- 11:30
- Flights
- 262
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 363, check with Delta Air Lines.
DL 363 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 262 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so DL 363 runs 9 points behind the country as a whole. Across a thousand flights that is about 90 extra late arrivals.
Key figures
On time
68.3%
Arrivals under 15 minutes late, of 259 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
0.76%
National rate is 1.89%
1 hour+ late
11.2%
National rate is 8.3%
These figures cover 262 flights between September 2025 and August 2026. Beyond the headline rate, 11.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 363 flies
DL 363 flies JFK to SFO without a single fixed slot. Its most common scheduled departure was 11:30, used on 83 of 262 flights, with 11:15 (80 flights) and 11:00 (48 flights) next.
- Departs 11:3083 flights31.7%
- Departs 11:1580 flights30.5%
- Departs 11:0048 flights18.3%
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 11:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 363 runs 10 points worse at 68.3%. 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 363 next to JFK to SFO
Every carrier on JFK to SFO combined arrived on time 71.4% of the time across 6,800 flights, so DL 363 is 3 points behind it. Delta flew 2,231 flights on the same city pair under all its flight numbers, including this one, and those ran 67.3% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 363thin sample | 262 | 68.3% | 69 min | 0.76% | C+ |
| All Delta Air Lines on JFK–SFO | 2,231 | 67.3% | 70 min | 2.20% | C |
| All carriers on JFK–SFO | 6,800 | 71.4% | 69 min | 2.57% | C |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | 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 93.3% on time and its weakest Jul–Sep 2026 at 45.6%, a swing of 48 points on roughly 52 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 202530 flights93.3%
- Oct–Dec 202575 flights74.3%
- Jan–Mar 202634 flights75.8%
- Apr–Jun 202665 flights66.2%
- Jul–Sep 202658 flights45.6%
Scale runs 35% to 100%.
By weekday, DL 363 did best on Tuesday at 80.6% on time and worst on Thursday at 57.5%. Each day rests on about 37 flights, so a gap of 23 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 363 runs when it is late
DL 363 often beats the schedule: 66 of 259 completed flights, 25%, arrived 15 minutes or more early. The 82 late arrivals split 28 under half an hour, 25 between 30 and 60 minutes, and 29 an hour or more.
- 15+ min early66 flights25.5%
- Within 15 min111 flights42.9%
- 15–29 min late28 flights10.8%
- 30–59 min late25 flights9.7%
- 1–2 hours late15 flights5.8%
- 2+ hours late14 flights5.4%
Scale runs 0% to 100%.
Share of 259 completed flights by arrival against schedule.
9 of 60 late departures made up the time and arrived on time, 15% of them. In the other direction, 31 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 SFO.
The worst days
Worst days for DL 363
The latest arrival of the period was on 3 August 2026, 6 hours 7 minutes behind schedule; most of its delay minutes were filed as extreme weather. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 August 2026 | 6 hours 7 minutes | Extreme weather |
| 16 July 2026 | 4 hours 29 minutes | Carrier |
| 27 October 2025 | 3 hours 50 minutes | Carrier |
| 8 April 2026 | 3 hours 38 minutes | Carrier |
| 24 August 2026 | 3 hours 35 minutes | Carrier |
Delay causes
Why DL 363 runs late
Carrier accounts for 45% of the 5,684 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 38%National Airspace System
- 10%Late-arriving aircraft
- 8%Extreme weather
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,545 of the 5,684 delay minutes reported here. The split is drawn from 5,684 delay minutes reported on DL 363.
Cancellations are rare at 0.76%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
11.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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.
The same number turns up on three other city pairs in the data, including SFO to JFK (218), CLT to DTW (3) and ATL to DTW (2), but none flew often enough under DL 363 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to JFK to SFO only.
One caution: this is a thin sample. 262 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 363
For a booking, read DL 363 as 68.3% on time with 0.76% cancelled over 262 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- JFK to SFO, every carrier and departure
- SFO to JFK, the return direction
- American Airlines 179 on the same route79.8%
- American Airlines 177 on the same route60.4%
- Delta Air Lines 668 on the same route71.8%
- Delta Air Lines 667 on the same route55.7%
- American Airlines 15 on the same route73.7%
- JetBlue Airways 115 on the same route80.9%
- John F. Kennedy International (JFK) delay statistics
- San Francisco International (SFO) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- How often a connection fails at the major US hubs
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 ; recomputed monthly. How this data is collected.