Flight number record

DL 1757

Delta Air Lines · Atlanta to San Juan

Route: ATL → SJU
Departs: 08:05
Flights: 312
Period: September 2025 to August 2026

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

DL 1757 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 11 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 40 minutes. That rests on 312 flights, with a median arrival 5 minutes early.

Set against the rest of the country, DL 1757's record is 11 points better than the US average of 77.3%. That gap is worth roughly 111 fewer late arrivals for every thousand flights.

On time

88.4%

Arrivals under 15 minutes late, of 310 completed flights

Avg delay

41 min

Across delayed arrivals only, not all flights

Cancelled

0.64%

National rate is 1.89%

1 hour+ late

1.3%

National rate is 8.3%

These figures cover 312 flights between September 2025 and August 2026. The median arrival is 5 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 1757 flies

DL 1757 flies ATL to SJU without a single fixed slot. Its most common scheduled departure was 08:05, used on 80 of 312 flights, with 08:36 (35 flights) and 08:15 (34 flights) next.

Departs 08:0580 flights25.6%
Departs 08:3635 flights11.2%
Departs 08:1534 flights10.9%

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 08:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 1757 runs 5 points better at 88.4%. 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 1757 next to ATL to SJU

Every carrier on ATL to SJU combined arrived on time 71.6% of the time across 2,101 flights, so DL 1757 is 17 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 76.9% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 7 points.

DL 1757 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1757thin sample	312	88.4%	41 min	0.64%	A+
All Delta Air Lines on ATL–SJU	1,638	76.9%	53 min	0.85%	B+
All carriers on ATL–SJU	2,101	71.6%	58 min	1.29%	C
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 1757 quarter by quarter

DL 1757 did not run the same all year. Its best quarter was Jul–Sep 2026 at 93.5% on time and its weakest Oct–Dec 2025 at 83.1%, a swing of 10 points on roughly 78 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 20254 flights—
Oct–Dec 202572 flights83.1%
Jan–Mar 202690 flights87.6%
Apr–Jun 202684 flights90.5%
Jul–Sep 202662 flights93.5%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1757 did best on Wednesday at 100.0% on time and worst on Monday at 82.1%. Each day rests on about 45 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 1757 runs when it is late

Most of the lateness is short. 22 of the 36 late arrivals were under half an hour behind, and 4 reached an hour or more.

15+ min early42 flights13.5%
Within 15 min232 flights74.8%
15–29 min late22 flights7.1%
30–59 min late10 flights3.2%
1–2 hours late3 flights1.0%
2+ hours late1 flights0.3%

Scale runs 0% to 100%.

Share of 310 completed flights by arrival against schedule.

A late pushback is often recovered here: of 30 departures that left 15 minutes late or more, 10 still arrived on time. In the other direction, 16 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 SJU.

The worst days

Worst days for DL 1757

The latest arrival of the period was on 16 March 2026, 5 hours behind schedule; most of its delay minutes were filed as national airspace system delay. The same cause led on four of the five worst days.

The latest arrivals of DL 1757 in the period
Date	Arrived late by	Largest filed cause
16 March 2026	5 hours	National Airspace System
25 January 2026	1 hour 48 minutes	National Airspace System
5 January 2026	1 hour 41 minutes	National Airspace System
26 December 2025	1 hour 22 minutes	National Airspace System
19 July 2026	59 minutes	Carrier

Delay causes

Why DL 1757 runs late

National Airspace System accounts for 65% of the 1,465 delay minutes carriers reported here, and the remaining four split what is left.

National Airspace System
65%
Carrier
31%
Late-arriving aircraft
4%

65% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 951 minutes out of 1,465, against a national NAS share of 21%. The split is drawn from 1,465 delay minutes reported on DL 1757.

Cancellations are rare at 0.64%, 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

Badly late arrivals are rare here: only 1.3% 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 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 (312 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. 312 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	312	90.8%	68 min	0.64%	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: 88.4% on time and 0.64% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures