Flight number record

DL 1757

Delta Air Lines · Atlanta to San Juan

Route: ATL → SJU
Departs: 08:05
Flights: 300
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1757, check with Delta Air Lines.

DL 1757 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 40 minutes. That rests on 300 flights, with a median arrival 3 minutes early.

Set against the rest of the country, DL 1757's record is 9 points better than the US average of 77.6%. That gap is worth roughly 90 fewer late arrivals for every thousand flights.

On time

86.6%

Arrivals under 15 minutes late, of 298 completed flights

Avg delay

41 min

Across delayed arrivals only, not all flights

Cancelled

0.67%

National rate is 1.81%

1 hour+ late

2.0%

National rate is 8.1%

These figures cover 300 flights between July 2025 and June 2026. The median arrival is 3 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.

Schedule

When DL 1757 flies

DL 1757 flies ATL to SJU without a single fixed slot. Its most common scheduled departure was 08:05, used on 36 of 300 flights, with 08:36 (35 flights) and 08:15 (34 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:0536 flights12.0%
Departs 08:3635 flights11.7%
Departs 08:1534 flights11.3%

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 08:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 1757 runs 3 points better at 86.6%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 1757 next to ATL to SJU

Every carrier on ATL to SJU combined arrived on time 70.5% of the time across 2,130 flights, so DL 1757 is 16 points ahead of it. Delta flew 1,636 flights on the same city pair under all its flight numbers, including this one, and those ran 75.8% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 5 points.

DL 1757 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1757thin sample	300	86.6%	41 min	0.67%	A+
All Delta Air Lines on ATL–SJU	1,636	75.8%	51 min	0.92%	B+
All carriers on ATL–SJU	2,130	70.5%	58 min	1.27%	C
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1757 quarter by quarter

Quarter by quarter DL 1757 held fairly steady: 83.3% in Jul–Sep 2025, 83.1% in Oct–Dec 2025, 87.6% in Jan–Mar 2026 and 90.5% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202554 flights83.3%
Oct–Dec 202572 flights83.1%
Jan–Mar 202690 flights87.6%
Apr–Jun 202684 flights90.5%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1757 did best on Wednesday at 94.7% on time and worst on Monday at 79.4%. Each day rests on about 43 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1757 runs late

One category carries most of the weight here. National Airspace System accounts for 60% of the 1,655 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.

National Airspace System
60%
Carrier
35%
Late-arriving aircraft
5%

The largest share of delay minutes, 35%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 586 of the 1,655 delay minutes reported here. The split is drawn from 1,655 delay minutes reported on DL 1757.

Cancellations are rare at 0.67%, below the national 1.81% 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

Badly late arrivals are rare here: only 2.0% land an hour or more behind schedule, against 8.1% 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.

DL 1757 is not only a ATL to SJU flight. It also flew SJU to ATL (300 flights, 90.8% 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. 300 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 1757
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SJU to ATLthin sample	300	90.8%	76 min	0.67%	A+

What to do with this

Booking DL 1757

For a booking, DL 1757 has one of the better records a US domestic flight can show: 86.6% on time and 0.67% cancelled. That is a base rate, not a promise about any single 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