Flight profile · American Airlines
AA1074
Miami (MIA) to Boston (BOS) · scheduled 5:35 PM – 8:31 PM
How AA1074 performs
951 operations, July 2023 – July 2026.
AA1074 arrived on time 61.0% of the time, against 70.3% for all MIA → BOS flights, so this departure is 9.3 percentage points worse than the route as a whole. Against American Airlines’ own flights on this route it is 10.2 points worse.
Source: US DOT Bureau of Transportation Statistics · 951 operations, July 2023 – July 2026 · If AA1074 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 AA1074 compares to other flight numbers, not just to itself.
Which day you fly matters unusually much here, a wider weekday spread than 100% of 1,710 comparable flight numbers.
78.7% on time on a typical Saturday, against 46.6% on a Sunday.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 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 AA1074 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 AA1074 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 |
|---|---|---|---|---|---|
| AA1074 | 61.0% | 1.68% | 3 min | 15.2% | 951 |
| American Airlines on MIA → BOS | 71.2% | 1.48% | -3 min | 11.0% | 6,974 |
| All MIA → BOS flights | 70.3% | 1.73% | -3 min | 12.0% | 11,478 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why AA1074 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for AA1074 on MIA → BOS. 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 AA1074 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, AA1074 pushed back an average of 37 minutes late; when it came in on time or early, an average of 16 minutes late.
Each departure is matched to the flight the same aircraft flew into MIA just before it, using the tail number in the DOT file, 755 of 935 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 |
|---|---|---|---|
| AA1074 | 20% | 67% | 30% |
| Network, same turn | 23% | 40% | 9% |
The schedule leaves a long gap on the ground, which gives a late aircraft room to catch up before this flight pushes back.
The network row is every flight with a scheduled turn of 90 minutes to 3 hours. How often AA1074’s aircraft landed 15 or more minutes late is lower than the network’s and, once the aircraft was late, how often AA1074 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 MIA late, does that still matter by the time it reaches BOS?
AA1074 pushes back an average of 24.0 minutes late and reaches the gate at BOS an average of 20.4 minutes late. The 3.6 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 22.7 minutes on the taxiways at MIA is about what any departure from the airport in that hour spends.
On arrival at BOS, AA1074 spends 7.0 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 1.9 minutes shorter than a typical BOS arrival (9.0 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 BOS. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 23,157 departures from MIA scheduled in the clock hour AA1074 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at BOS (440,886 flights), not just AA1074’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves MIA
Part of any flight’s record belongs to the clock rather than to the flight. AA1074 has one departure time, so this is what that time is worth.
On-time arrival rate. 23,157 departures from MIA are scheduled in the 5 PM–6 PM hour over the period, against 340,469 across the whole day.
AA1074 is scheduled out of MIA at 5:35 PM, in the 5 PM–6 PM bank. Departures from MIA in that hour arrive on time 63.3% of the time against 73.2% across the airport’s whole day — the slot alone is worth 9.9 points worse before anything about this particular flight is considered.
The two airport figures cover every departure from MIA 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.
By day of week
Does AA1074 run worse on particular days?
Saturday is historically the most reliable day and Sunday the least, a gap of 32.1 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Days with fewer than 120 operations are not scored.
Other routes AA1074 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 |
|---|---|---|---|
| IAH→CLT Houston to Charlotte | June 5, 2024 – October 6, 2024 | 95 | 68.2% |
| BOS→MIA Boston to Miami | November 25–26, 2023 | 2 | — |
| CLT→CMH Charlotte to Columbus | October 5, 2023 – November 4, 2023 | 31 | — |
| CMH→CLT Columbus to Charlotte | October 5, 2023 – November 4, 2023 | 28 | — |
| LAX→PHL Los Angeles to Philadelphia | September 6, 2023 – October 4, 2023 | 29 | — |
| BNA→PHX Nashville to Phoenix | July 1, 2023 – August 12, 2023 | 7 | — |
Because the same number has served different journeys, the statistics above describe only the route AA1074 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.
80 min late
against a median of 3 min late
AA1074 has an average that understates its risk: a typical arrival is 3 min late, but the worst tenth are 77 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 951 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 |
|---|---|---|---|---|
| AA2247 | American Airlines | 88.7% | 10 min early | 680 |
| DL1399 | Delta Air Lines | 73.8% | 5 min early | 650 |
| B61220 | JetBlue | 69.0% | 4 min early | 728 |
| AA1054 | American Airlines | 65.3% | 1 min late | 1,117 |
| AA2539 | American Airlines | 63.3% | 3 min late | 1,011 |
| AA1074 this flight | American Airlines | 61.0% | 3 min late | 951 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. AA1074 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 951 records of AA1074 operating MIA → BOS, 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
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