Flight profile · Delta Air Lines
DL973
Boston (BOS) to Atlanta (ATL) · scheduled 10:10 AM – 12:57 PM
How DL973 performs
932 operations, July 2023 – July 2026.
DL973 arrived on time 81.4% of the time, against 78.5% for all BOS → ATL flights, so this departure is 2.9 percentage points better than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 932 operations, July 2023 – July 2026 · If DL973 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where DL973 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 DL973 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 |
|---|---|---|---|---|---|
| DL973 | 81.4% | 1.39% | -7 min | 7.9% | 932 |
| Delta Air Lines on BOS → ATL | 82.0% | 1.08% | -9 min | 6.6% | 11,228 |
| All BOS → ATL flights | 78.5% | 1.38% | -8 min | 8.0% | 15,469 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why DL973 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
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 DL973 on BOS → ATL. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies DL973 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, DL973 pushed back an average of 56 minutes late; when it came in on time or early, an average of 3 minutes late.
Each departure is matched to the flight the same aircraft flew into BOS just before it, using the tail number in the DOT file, 865 of 919 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| DL973 | 16% | 76% | 10% |
| Network, same turn | 17% | 68% | 9% |
The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often DL973’s aircraft landed 15 or more minutes late is about the same as the network’s and, once the aircraft was late, how often DL973 left 15 or more minutes late is higher than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
From pushback to gate
When it leaves BOS late, does that still matter by the time it reaches ATL?
DL973 pushes back an average of 13.0 minutes late and reaches the gate at ATL an average of 2.9 minutes late. The 10.0 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. Its 19.9 minutes on the taxiways at BOS is about what any departure from the airport in that hour spends.
On arrival at ATL, DL973 spends 8.0 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 1.6 minutes shorter than a typical ATL arrival (9.6 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached ATL. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 24,738 departures from BOS scheduled in the clock hour DL973 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at ATL (1,012,161 flights), not just DL973’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves BOS
Part of any flight’s record belongs to the clock rather than to the flight. DL973 has one departure time, so this is what that time is worth.
On-time arrival rate. 24,738 departures from BOS are scheduled in the 10 AM–11 AM hour over the period, against 440,893 across the whole day.
DL973 is scheduled out of BOS at 10:10 AM, in the 10 AM–11 AM bank. Departures from BOS in that hour arrive on time 82.4% of the time against 77.2% across the airport’s whole day — the slot alone is worth 5.2 points better before anything about this particular flight is considered.
The two airport figures cover every departure from BOS to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Hours below 120 departures are not scored.
Other routes DL973 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| ATL→FAY Atlanta to Fayetteville | May 11, 2024 – June 1, 2024 | 5 | — |
| FAY→ATL Fayetteville to Atlanta | May 11, 2024 – June 1, 2024 | 5 | — |
| MCI→ATL Kansas City to Atlanta | January 8, 2024 – March 9, 2024 | 34 | — |
| ATL→MCI Atlanta to Kansas City | January 8, 2024 – February 12, 2024 | 14 | — |
| ATL→SFO Atlanta to San Francisco | November 5, 2023 – December 6, 2023 | 31 | — |
| BOS→DFW Boston to Dallas–Fort Worth | July 1–8, 2023 | 2 | — |
Because the same number has served different journeys, the statistics above describe only the route DL973 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
43 min late
against a median of 7 min early
Percentiles over 932 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL695 | Delta Air Lines | 90.3% | 13 min early | 1,126 |
| DL456 | Delta Air Lines | 87.7% | 10 min early | 1,105 |
| DL923 | Delta Air Lines | 85.6% | 11 min early | 1,056 |
| DL376 | Delta Air Lines | 85.0% | 9 min early | 807 |
| DL385 | Delta Air Lines | 82.7% | 9 min early | 1,075 |
| B61097 | JetBlue | 81.6% | 10 min early | 902 |
| DL322 | Delta Air Lines | 81.4% | 8 min early | 1,115 |
| DL973 this flight | Delta Air Lines | 81.4% | 7 min early | 932 |
| DL638 | Delta Air Lines | 76.0% | 4 min early | 870 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. DL973 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 932 records of DL973 operating BOS → 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 excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
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