Flight number record
DL 557
Delta Air Lines · Atlanta to New York
- Route
- ATL → LGA
- Departs
- 09:30
- Flights
- 338
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s DL 557, check with Delta Air Lines.
DL 557 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 about 50 minutes. That rests on 338 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 557's record is 9 points better than the US average of 77.6%. That gap is worth roughly 91 fewer late arrivals for every thousand flights.
Key figures
On time
86.7%
Arrivals under 15 minutes late, of 331 completed flights
Avg delay
49 min
Across delayed arrivals only, not all flights
Cancelled
2.07%
National rate is 1.81%
1 hour+ late
3.6%
National rate is 8.1%
These figures cover 338 flights between July 2025 and June 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.
Schedule
When DL 557 flies
DL 557 is scheduled to leave Atlanta (ATL) at 09:30 local time and reach New York (LGA) at 11:46. That slot held for 321 of the 338 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.
- Departs 09:30321 flights95.0%
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 09:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 557 runs 3 points better at 86.7%. 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 557 next to ATL to LGA
Every carrier on ATL to LGA combined arrived on time 73.4% of the time across 8,344 flights, so DL 557 is 13 points ahead of it. Delta flew 4,936 flights on the same city pair under all its flight numbers, including this one, and those ran 76.7% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 557thin sample | 338 | 86.7% | 49 min | 2.07% | A |
| All Delta Air Lines on ATL–LGA | 4,936 | 76.7% | 66 min | 2.96% | B |
| All carriers on ATL–LGA | 8,344 | 73.4% | 75 min | 3.61% | C− |
| Delta Air Lines, whole network | 1,038,570 | 81.6% | 71 min | 1.62% | B |
Across the year
DL 557 quarter by quarter
DL 557 did not run the same all year. Its best quarter was Jul–Sep 2025 at 94.0% on time and its weakest Oct–Dec 2025 at 82.2%, a swing of 12 points on roughly 85 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 202585 flights94.0%
- Oct–Dec 202590 flights82.2%
- Jan–Mar 202678 flights86.3%
- Apr–Jun 202685 flights84.5%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 557 did best on Friday at 94.1% on time and worst on Monday at 81.6%. Each day rests on about 48 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Delay causes
Why DL 557 runs late
One category carries most of the weight here. Carrier accounts for 51% of the 2,174 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.
- 51%Carrier
- 38%National Airspace System
- 11%Late-arriving aircraft
- 0%Extreme weather
38% 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 822 minutes out of 2,174, against a national NAS share of 21%. The split is drawn from 2,174 delay minutes reported on DL 557.
Cancellations sit at 2.07% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.6% 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.
The 762 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on one other city pair in the data, including DTW to MSN (2), but none flew often enough under DL 557 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to LGA only.
One caution: this is a thin sample. 338 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 557
For a booking, read DL 557 as 86.7% on time with 2.07% cancelled over 338 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to LGA, every carrier and departure
- LGA to ATL, the return direction
- Delta Air Lines 520 on the same route70.4%
- Frontier Airlines 3288 on the same route40.8%
- Delta Air Lines 997 on the same route66.2%
- Delta Air Lines 513 on the same route88.6%
- Delta Air Lines 371 on the same route85.5%
- Delta Air Lines 434 on the same route62.2%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- LaGuardia (LGA) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.