Flight number record
DL 3146
Delta Air Lines · Atlanta to New Orleans
- Route
- ATL → MSY
- Departs
- 15:19
- Flights
- 255
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 3146, check with Delta Air Lines.
DL 3146 lands a B, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 255 flights, with a median arrival 2 minutes early.
Key figures
On time
77.2%
Arrivals under 15 minutes late, of 250 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
1.96%
National rate is 1.89%
1 hour+ late
6.0%
National rate is 8.3%
These figures cover 255 flights between September 2025 and August 2026. The median arrival is 2 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.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When DL 3146 flies
DL 3146 flies ATL to MSY without a single fixed slot. Its most common scheduled departure was 15:19, used on 30 of 255 flights, with 15:44 (29 flights) and 15:33 (29 flights) next.
- Departs 15:1930 flights11.8%
- Departs 15:4429 flights11.4%
- Departs 15:3329 flights11.4%
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 15:19 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 3146 runs 5 points better at 77.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
DL 3146 next to ATL to MSY
Every carrier on ATL to MSY combined arrived on time 81.4% of the time across 4,002 flights, so DL 3146 is 4 points behind it. Delta flew 3,276 flights on the same city pair under all its flight numbers, including this one, and those ran 83.5% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 3146thin sample | 255 | 77.2% | 61 min | 1.96% | B |
| All Delta Air Lines on ATL–MSY | 3,276 | 83.5% | 59 min | 1.47% | B |
| All carriers on ATL–MSY | 4,002 | 81.4% | 59 min | 1.45% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 3146 quarter by quarter
DL 3146 did not run the same all year. Its best quarter was Apr–Jun 2026 at 84.4% on time and its weakest Jul–Sep 2026 at 66.1%, a swing of 18 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.
- Oct–Dec 202512 flights—
- Jan–Mar 202690 flights75.6%
- Apr–Jun 202691 flights84.4%
- Jul–Sep 202662 flights66.1%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, DL 3146 did best on Monday at 83.8% on time and worst on Friday at 57.1%. Each day rests on about 36 flights, so a gap of 27 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 3146 runs when it is late
The 57 late arrivals split 25 under half an hour, 17 between 30 and 60 minutes, and 15 an hour or more.
- 15+ min early20 flights8.0%
- Within 15 min173 flights69.2%
- 15–29 min late25 flights10.0%
- 30–59 min late17 flights6.8%
- 1–2 hours late7 flights2.8%
- 2+ hours late8 flights3.2%
Scale runs 0% to 100%.
Share of 250 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 47 departures that left 15 minutes late or more, only 1 made it up before arrival. 11 flights left on time and still arrived late.
The worst days
Worst days for DL 3146
The latest arrival of the period was on 19 July 2026, 5 hours 47 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across July, June and March, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 July 2026 | 5 hours 47 minutes | Late-arriving aircraft |
| 18 June 2026 | 4 hours 4 minutes | Extreme weather |
| 14 March 2026 | 3 hours 58 minutes | Carrier |
| 14 June 2026 | 3 hours 49 minutes | Late-arriving aircraft |
| 16 March 2026 | 3 hours | Extreme weather |
Delay causes
Why DL 3146 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,461 reported delay minutes.
- 41%Carrier
- 24%Late-arriving aircraft
- 19%National Airspace System
- 13%Extreme weather
- 2%Security
Extreme weather accounts for 13% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.2 times the usual weather exposure. The split is drawn from 3,461 delay minutes reported on DL 3146.
Cancellations sit at 1.96% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
6.0% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The same number turns up on one other city pair in the data, including MSY to ATL (167), but none flew often enough under DL 3146 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to MSY only.
One caution: this is a thin sample. 255 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 3146
For a booking, read DL 3146 as 77.2% on time with 1.96% cancelled over 255 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to MSY, every carrier and departure
- MSY to ATL, the return direction
- Delta Air Lines 2542 on the same route88.0%
- Delta Air Lines 1450 on the same route75.8%
- Delta Air Lines 2224 on the same route82.8%
- Delta Air Lines 3128 on the same route93.0%
- Delta Air Lines 3157 on the same route83.3%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Louis Armstrong New Orleans International (MSY) 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.