Flight profile · American Airlines
AA577
Dallas–Fort Worth (DFW) to Denver (DEN) · scheduled 8:57 PM – 9:59 PM
How AA577 performs
1,050 operations, July 2023 – July 2026.
AA577 arrived on time 54.9% of the time, against 70.4% for all DFW → DEN flights, so this departure is 15.5 percentage points worse than the route as a whole. Against American Airlines’ own flights on this route it is 10.4 points worse.
Source: US DOT Bureau of Transportation Statistics · 1,050 operations, July 2023 – July 2026 · If AA577 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 AA577 compares to other flight numbers, not just to itself.
Which day you fly matters unusually much here, a wider weekday spread than 97% of 1,710 comparable flight numbers.
62.7% on time on a typical Tuesday, against 41.6% 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 AA577 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 AA577 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 |
|---|---|---|---|---|---|
| AA577 | 54.9% | 3.33% | 10 min | 16.9% | 1,050 |
| American Airlines on DFW → DEN | 65.3% | 2.51% | 1 min | 12.8% | 9,374 |
| All DFW → DEN flights | 70.4% | 1.97% | -3 min | 11.4% | 18,864 |
AA577 has cancelled 3.33% of its scheduled departures (35 of 1,050), against 1.97% for all DFW → DEN flights — this specific departure cancels 1.4 percentage points more often than the route as a whole. Different flight numbers on the same route can carry different aircraft, crews and schedules, so this is a fact about AA577 specifically, not about the route it flies.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why AA577 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 AA577 on DFW → DEN. 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 AA577 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, AA577 pushed back an average of 46 minutes late; when it came in on time or early, an average of 13 minutes late.
Each departure is matched to the flight the same aircraft flew into DFW just before it, using the tail number in the DOT file, 937 of 1,015 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 |
|---|---|---|---|
| AA577 | 30% | 73% | 29% |
| 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 AA577’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often AA577 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 DFW late, does that still matter by the time it reaches DEN?
On arrival at DEN, AA577 spends 10.2 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 about what any arrival at DEN spends on the ground before reaching the gate.
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 DEN. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 50,449 departures from DFW scheduled in the clock hour AA577 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at DEN (963,027 flights), not just AA577’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves DFW
Part of any flight’s record belongs to the clock rather than to the flight. AA577 has one departure time, so this is what that time is worth.
On-time arrival rate. 50,449 departures from DFW are scheduled in the 8 PM–9 PM hour over the period, against 961,718 across the whole day.
AA577 is scheduled out of DFW at 8:57 PM, in the 8 PM–9 PM bank. Departures from DFW in that hour arrive on time 62.7% of the time against 73.1% across the airport’s whole day — the slot alone is worth 10.4 points worse before anything about this particular flight is considered.
The two airport figures cover every departure from DFW 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 AA577 run worse on particular days?
Tuesday is historically the most reliable day and Sunday the least, a gap of 21.1 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 AA577 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 |
|---|---|---|---|
| PHL→PHX Philadelphia to Phoenix | February 12, 2026 – March 7, 2026 | 21 | — |
| DFW→LGA Dallas–Fort Worth to New York | November 5, 2024 | 1 | — |
| STT→DFW Charlotte Amalie to Dallas–Fort Worth | April 6, 2024 – May 4, 2024 | 5 | — |
Because the same number has served different journeys, the statistics above describe only the route AA577 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.
88 min late
against a median of 10 min late
AA577 has an average that understates its risk: a typical arrival is 10 min late, but the worst tenth are 78 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 1,050 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 |
|---|---|---|---|---|
| F92147 | Frontier Airlines | 84.6% | 10 min early | 824 |
| UA1380 | United Airlines | 83.4% | 11 min early | 738 |
| AA1523 | American Airlines | 82.0% | 10 min early | 640 |
| AA2357 | American Airlines | 79.0% | 7 min early | 735 |
| AA420 | American Airlines | 78.3% | 8 min early | 1,028 |
| F92631 | Frontier Airlines | 72.7% | 6 min early | 638 |
| UA2655 | United Airlines | 65.6% | 3 min late | 968 |
| AA1832 | American Airlines | 64.8% | 1 min late | 1,074 |
| AA577 this flight | American Airlines | 54.9% | 10 min late | 1,050 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. AA577 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 1,050 records of AA577 operating DFW → DEN, 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