Flight number record
DL 1763
Delta Air Lines · San Juan to Atlanta
- Route
- SJU → ATL
- Departs
- 07:30
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1763, check with Delta Air Lines.
DL 1763 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 18 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 365 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 1763's record is 18 points better than the US average of 77.3%. That gap is worth roughly 180 fewer late arrivals for every thousand flights.
Key figures
On time
95.3%
Arrivals under 15 minutes late, of 360 completed flights
Avg delay
96 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.89%
1 hour+ late
1.1%
National rate is 8.3%
These figures cover 365 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 1763 flies
DL 1763 flies SJU to ATL without a single fixed slot. Its most common scheduled departure was 07:30, used on 262 of 365 flights, with 07:00 (69 flights) next.
- Departs 07:30262 flights71.8%
- Departs 07:0069 flights18.9%
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 07:30 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1763 runs 6 points better at 95.3%. 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 1763 next to SJU to ATL
Every carrier on SJU to ATL combined arrived on time 81.6% of the time across 2,097 flights, so DL 1763 is 14 points ahead of it. Delta flew 1,638 flights on the same city pair under all its flight numbers, including this one, and those ran 90.9% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 14 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1763 | 365 | 95.3% | 96 min | 1.10% | A |
| All Delta Air Lines on SJU–ATL | 1,638 | 90.9% | 78 min | 0.85% | A+ |
| All carriers on SJU–ATL | 2,097 | 81.6% | 80 min | 1.34% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1763 quarter by quarter
Quarter by quarter DL 1763 held fairly steady: 96.7% in Jul–Sep 2025, 95.5% in Oct–Dec 2025, 93.2% in Jan–Mar 2026, 94.5% in Apr–Jun 2026 and 98.4% in Jul–Sep 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights96.7%
- Oct–Dec 202592 flights95.5%
- Jan–Mar 202690 flights93.2%
- Apr–Jun 202691 flights94.5%
- Jul–Sep 202662 flights98.4%
Scale runs 85% to 100%.
By weekday, DL 1763 ranged from 92.2% on Sunday to 98.0% on Thursday. With about 52 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 1763 runs when it is late
DL 1763 often beats the schedule: 107 of 360 completed flights, 30%, arrived 15 minutes or more early. The 17 late arrivals split 7 under half an hour, 6 between 30 and 60 minutes, and 4 an hour or more.
- 15+ min early107 flights29.7%
- Within 15 min236 flights65.6%
- 15–29 min late7 flights1.9%
- 30–59 min late6 flights1.7%
- 1–2 hours late1 flights0.3%
- 2+ hours late3 flights0.8%
Scale runs 0% to 100%.
Share of 360 completed flights by arrival against schedule.
Only 14 of 360 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for DL 1763
The latest arrival of the period was on 2 January 2026, 9 hours 28 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 2 January 2026 | 9 hours 28 minutes | Carrier |
| 7 March 2026 | 5 hours 30 minutes | Carrier |
| 13 April 2026 | 3 hours 53 minutes | Carrier |
| 14 March 2026 | 1 hour 31 minutes | Carrier |
| 29 April 2026 | 59 minutes | Carrier |
Delay causes
Why DL 1763 runs late
Carrier accounts for 89% of the 1,637 delay minutes carriers reported here, and the remaining four split what is left.
- 89%Carrier
- 7%National Airspace System
- 3%Late-arriving aircraft
- 1%Extreme weather
The largest share of delay minutes, 89%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,449 of the 1,637 delay minutes reported here. The split is drawn from 1,637 delay minutes reported on DL 1763.
Cancellations sit at 1.10% against a national 1.89%, 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 1.1% 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 1,547 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 365 flights under DL 1763 in the data flew SJU 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 1763
For a booking, DL 1763 has one of the better records a US domestic flight can show: 95.3% on time and 1.10% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SJU to ATL, every carrier and departure
- ATL to SJU, the return direction
- Delta Air Lines 1946 on the same route88.1%
- Delta Air Lines 1882 on the same route86.9%
- Delta Air Lines 1757 on the same route90.8%
- Frontier Airlines 2871 on the same route54.8%
- Luis Munoz Marin International (SJU) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) 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
- Worst months to fly in the US, ranked by the data
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.