Flight profile · Delta Air Lines
DL3125
Indianapolis (IND) to Atlanta (ATL) · scheduled 10:01 AM – 11:35 AM
How DL3125 performs
612 operations, June 2024 – August 2026.
Between its first and last recorded date on IND → ATL, DL3125 averaged about 5 operations a week (612 in 813 days, cancelled ones included).
DL3125 arrived on time 95.8% of the time, against 86.5% for all IND → ATL flights, so this departure is 9.3 percentage points better than the route as a whole. Against Delta Air Lines’ own flights on this route it is 7.2 points better.
Source: US DOT Bureau of Transportation Statistics · 612 operations, June 2024 – August 2026 · If DL3125 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
What stands out
How DL3125 compares to other flight numbers, not just to itself.
This flight stays close to typical even on its worst days, a smaller gap than 97% of 12,358 comparable flight numbers.
A typical arrival is 15 min early, and the worst tenth are only 17 minutes worse than that.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – August 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.
Where DL3125 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| DL3125 | 95.8% | 1.80% | -15 min | 1.8% | 612 |
| Delta Air Lines on IND → ATL | 88.6% | 0.92% | -12 min | 4.0% | 8,079 |
| All IND → ATL flights | 86.5% | 0.86% | -10 min | 4.4% | 10,350 |
DL3125 cancelled 11 of 612 operations (1.80%), above the 0.86% for IND → ATL.
1.8% of DL3125’s arrivals were an hour or more late, against 4.4% across IND → ATL, so the long delays are less common on this number than on the route.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – August 2026
Why DL3125 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
Share of the delay minutes US DOT attributed to each cause for DL3125 on IND → ATL. 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 DL3125 comes in late, and what that does to the departure.
The aircraft flying DL3125 came in 15 or more minutes late on 6% 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 IND: 592 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 |
|---|---|
| DL3125 | 6% |
| Network, same turn | 17% |
65 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 DL3125’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 IND late, does that still matter by the time it reaches ATL?
DL3125 pushes back an average of 0.6 minutes late and reaches the gate at ATL an average of 8.2 minutes early. The 8.8 minutes between those two figures are slack the published schedule already carries, so on average a late pushback on this flight is made up before the gate. Its 13.4 minutes on the taxiways at IND is about what any departure from the airport in that hour spends.
On arrival at ATL, DL3125 spends 7.5 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 2.1 minutes shorter than a typical ATL arrival (9.6 min).
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 7,390 IND departures. Taxi-in is landing to gate, set against 1,039,387 arrivals at ATL. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – August 2026
The hour it leaves IND
DL3125 has one departure time, 10:01 AM, so this is what that hour at IND is worth.
On-time arrival rate. 7,390 departures from IND are scheduled in the 10 AM–11 AM hour over the period, against 151,043 across the whole day.
DL3125 is scheduled out of IND at 10:01 AM, in the 10 AM–11 AM bank. Departures from IND in that hour arrive on time 89.3% of the time against 81.8% across the airport’s whole day — the slot alone is worth 7.4 points better before anything about this particular flight is considered.
Both airport figures cover every destination from IND, 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 DL3125 has flown
Carriers reassign flight numbers. DL3125 also served this other city pair in the period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| ATL→IND Atlanta to Indianapolis | June 7, 2024 – August 28, 2026 | 563 | 95.3% |
The figures above describe only IND → ATL, the route DL3125 flies now.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
2 min late
against a median of 15 min early
Percentiles over 612 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 |
|---|---|---|---|---|
| DL3125 this flight | Delta Air Lines | 95.8% | 15 min early | 612 |
| DL3105 | Delta Air Lines | 94.3% | 14 min early | 815 |
| DL2952 | Delta Air Lines | 91.1% | 13 min early | 653 |
| DL3106 | Delta Air Lines | 90.2% | 9 min early | 766 |
| DL3134 | Delta Air Lines | 86.6% | 12 min early | 654 |
| DL3013 | Delta Air Lines | 85.9% | 12 min early | 742 |
Among all 6 departures on this route with at least 600 operations, DL3125 has the highest on-time rate. 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 612 records of DL3125 operating IND → ATL, 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