Flight profile · Delta Air Lines
DL3157
Atlanta (ATL) to New Orleans (MSY) · scheduled 1:59 PM – 2:23 PM
How DL3157 performs
611 operations, June 2024 – August 2026.
Between its first and last recorded date on ATL → MSY, DL3157 averaged about 5 operations a week (611 in 816 days, cancelled ones included).
DL3157 arrived on time 79.3% of the time, against 78.1% for all ATL → MSY flights, so this departure is 1.2 percentage points better than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 611 operations, June 2024 – August 2026 · If DL3157 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where DL3157 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
Ask for the position of DL3157 right now, if receivers on the ground are hearing it. Nothing is requested until you press the button.
Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| DL3157 | 79.3% | 1.64% | -3 min | 5.7% | 611 |
| Delta Air Lines on ATL → MSY | 79.4% | 1.32% | -4 min | 6.3% | 10,142 |
| All ATL → MSY flights | 78.1% | 1.23% | -4 min | 6.9% | 13,788 |
DL3157 cancelled 10 of 611 operations (1.64%), close to the 1.23% for ATL → MSY.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – August 2026
Why DL3157 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for DL3157 on ATL → MSY. Only delays of 15 minutes or more are attributed. What the five causes mean
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – August 2026
Does a late aircraft delay this flight?
How often the plane that flies DL3157 comes in late, and what that does to the departure.
The aircraft flying DL3157 came in 15 or more minutes late on 13% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.
Matched by tail number to the aircraft’s previous flight into ATL: 574 of 601 departures. Unknown, cancelled or diverted inbounds and gaps over 12 hours are left out.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late |
|---|---|
| DL3157 | 13% |
| Network, same turn | 17% |
73 scheduled minutes is enough to clean and board when the aircraft is on time, with little to spare when it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often DL3157’s aircraft landed 15 or more minutes late is lower than the network’s. There are not enough departures in both groups to compare how it left.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – August 2026
From pushback to gate
When it leaves ATL late, does that still matter by the time it reaches MSY?
On arrival at MSY, DL3157 spends 7.7 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 2.3 minutes longer than a typical MSY arrival (5.4 min).
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 51,978 ATL departures. Taxi-in is landing to gate, set against 157,766 arrivals at MSY. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – August 2026
The hour it leaves ATL
DL3157 has one departure time, 1:59 PM, so this is what that hour at ATL is worth.
On-time arrival rate. 51,978 departures from ATL are scheduled in the 1 PM–2 PM hour over the period, against 1,039,468 across the whole day.
DL3157 is scheduled out of ATL at 1:59 PM, in the 1 PM–2 PM bank. Departures from ATL in that hour arrive on time 81.4% of the time against 78.6% across the airport’s whole day, so the hour DL3157 leaves in is an ordinary one for ATL and explains nothing about its record either way.
Both airport figures cover every destination from ATL, so they describe the slot, not this journey; the route comparison is above. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – August 2026 · Hours below 120 departures are not scored.
Other routes DL3157 has flown
Carriers reassign flight numbers. DL3157 also served this other city pair in the period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| MSY→ATL New Orleans to Atlanta | June 7, 2024 – August 31, 2026 | 609 | 75.9% |
The figures above describe only ATL → MSY, the route DL3157 flies now.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
34 min late
against a median of 3 min early
Percentiles over 611 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – August 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL3128 | Delta Air Lines | 90.7% | 9 min early | 751 |
| DL1424 | Delta Air Lines | 86.4% | 7 min early | 749 |
| DL2542 | Delta Air Lines | 83.4% | 4 min early | 1,105 |
| DL3157 this flight | Delta Air Lines | 79.3% | 3 min early | 611 |
| DL3146 | Delta Air Lines | 76.4% | 3 min early | 619 |
| DL2224 | Delta Air Lines | 75.0% | 3 min early | 1,122 |
| DL1450 | Delta Air Lines | 70.0% | 1 min early | 707 |
Among all 7 departures on this route with at least 600 operations, DL3157 has the 4th highest on-time rate, 11.4 points behind the best. Every departure here has at least 600 operations; the other rows are the most punctual on the route, not all of them.
Data and methodology
Calculated by FlyerIntel from 611 records of DL3157 operating ATL → MSY, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule; cancelled and diverted flights are reported separately, not in the on-time rate.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
Analysis last recomputed