Flight number record
DL 342
Delta Air Lines · New York to Atlanta
- Route
- LGA → ATL
- Departs
- 06:59
- Flights
- 349
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 342, check with Delta Air Lines.
DL 342 earns an A−. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 349 flights, with a median arrival 15 minutes early.
Set against the rest of the country, DL 342's record is 16 points better than the US average of 77.3%. That gap is worth roughly 158 fewer late arrivals for every thousand flights.
Key figures
On time
93.1%
Arrivals under 15 minutes late, of 334 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
4.01%
National rate is 1.89%
1 hour+ late
2.4%
National rate is 8.3%
These figures cover 349 flights between September 2025 and August 2026. The median arrival is 15 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 342 flies
DL 342 flies LGA to ATL without a single fixed slot. Its most common scheduled departure was 06:59, used on 262 of 349 flights, with 07:00 (81 flights) next.
- Departs 06:59262 flights75.1%
- Departs 07:0081 flights23.2%
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 06:59 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 342 runs 4 points better at 93.1%. 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 342 next to LGA to ATL
Every carrier on LGA to ATL combined arrived on time 75.5% of the time across 8,500 flights, so DL 342 is 18 points ahead of it. Delta flew 4,935 flights on the same city pair under all its flight numbers, including this one, and those ran 79.1% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 342thin sample | 349 | 93.1% | 65 min | 4.01% | A− |
| All Delta Air Lines on LGA–ATL | 4,935 | 79.1% | 73 min | 3.55% | B− |
| All carriers on LGA–ATL | 8,500 | 75.5% | 79 min | 4.36% | B− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 342 quarter by quarter
DL 342 did not run the same all year. Its best quarter was Apr–Jun 2026 at 98.9% on time and its weakest Jan–Mar 2026 at 87.3%, a swing of 12 points on roughly 70 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 flights96.7%
- Oct–Dec 202580 flights89.6%
- Jan–Mar 202686 flights87.3%
- Apr–Jun 202691 flights98.9%
- Jul–Sep 202662 flights95.0%
Scale runs 80% to 100%.
By weekday, DL 342 ranged from 89.1% on Sunday to 98.0% on Friday. With about 50 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 342 runs when it is late
DL 342 often beats the schedule: 177 of 334 completed flights, 53%, arrived 15 minutes or more early. The 23 late arrivals split 7 under half an hour, 8 between 30 and 60 minutes, and 8 an hour or more.
- 15+ min early177 flights53.0%
- Within 15 min134 flights40.1%
- 15–29 min late7 flights2.1%
- 30–59 min late8 flights2.4%
- 1–2 hours late6 flights1.8%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 334 completed flights by arrival against schedule.
Only 14 of 334 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 342
The latest arrival of the period was on 7 December 2025, 4 hours 46 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. 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 |
|---|---|---|
| 7 December 2025 | 4 hours 46 minutes | National Airspace System |
| 21 November 2025 | 3 hours 4 minutes | Carrier |
| 10 August 2026 | 1 hour 47 minutes | Carrier |
| 12 January 2026 | 1 hour 27 minutes | Carrier |
| 27 November 2025 | 1 hour 21 minutes | Carrier |
Delay causes
Why DL 342 runs late
Carrier accounts for 52% of the 1,499 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Carrier
- 45%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 52%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 780 of the 1,499 delay minutes reported here. The split is drawn from 1,499 delay minutes reported on DL 342.
Cancellations run at 4.01%, against 1.89% nationally. That is about one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.4% 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.
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.
The same number turns up on one other city pair in the data, including MCO to MSP (12), but none flew often enough under DL 342 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LGA to ATL only.
One caution: this is a thin sample. 349 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 342
For a booking, the cancellation rate is the figure to plan around on DL 342: 4.01% of its 349 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- LGA to ATL, every carrier and departure
- ATL to LGA, the return direction
- Delta Air Lines 550 on the same route89.4%
- Frontier Airlines 3287 on the same route60.8%
- Delta Air Lines 992 on the same route86.0%
- Delta Air Lines 968 on the same route74.1%
- Delta Air Lines 993 on the same route82.6%
- Delta Air Lines 974 on the same route79.6%
- LaGuardia (LGA) 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
- What a cancellation rate actually tells you (and what it hides)
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.