Flight profile · American Airlines
AA1874
Philadelphia (PHL) to Boston (BOS) · scheduled 9:15 PM – 10:26 PM
How AA1874 performs
964 operations, July 2023 – July 2026.
AA1874 arrived on time 71.9% of the time, against 76.1% for all PHL → BOS flights, so this departure is 4.2 percentage points worse than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 964 operations, July 2023 – July 2026 · If AA1874 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where AA1874 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 |
|---|---|---|---|---|---|
| AA1874 | 71.9% | 3.32% | -4 min | 11.7% | 964 |
| American Airlines on PHL → BOS | 72.2% | 2.29% | -6 min | 12.7% | 7,371 |
| All PHL → BOS flights | 76.1% | 2.28% | -8 min | 10.6% | 15,492 |
AA1874 has cancelled 3.32% of its scheduled departures (32 of 964), against 2.28% for all PHL → BOS flights — this specific departure cancels 1.0 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 AA1874 specifically, not about the route it flies.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why AA1874 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 AA1874 on PHL → 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 AA1874 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, AA1874 pushed back an average of 39 minutes late; when it came in on time or early, an average of 6 minutes late.
Each departure is matched to the flight the same aircraft flew into PHL just before it, using the tail number in the DOT file, 842 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 |
|---|---|---|---|
| AA1874 | 32% | 59% | 16% |
| 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 AA1874’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often AA1874 left 15 or more minutes late is lower 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 PHL late, does that still matter by the time it reaches BOS?
AA1874 pushes back an average of 21.3 minutes late and reaches the gate at BOS an average of 14.4 minutes late. The 6.8 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 20.2 minutes on the taxiways at PHL is about what any departure from the airport in that hour spends.
On arrival at BOS, AA1874 spends 6.3 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 2.6 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 12,711 departures from PHL scheduled in the clock hour AA1874 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 AA1874’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves PHL
Part of any flight’s record belongs to the clock rather than to the flight. AA1874 has one departure time, so this is what that time is worth.
On-time arrival rate. 12,711 departures from PHL are scheduled in the 9 PM–10 PM hour over the period, against 305,181 across the whole day.
AA1874 is scheduled out of PHL at 9:15 PM, in the 9 PM–10 PM bank. Departures from PHL in that hour arrive on time 72.3% of the time against 76.2% across the airport’s whole day — the slot alone is worth 3.9 points worse before anything about this particular flight is considered.
The two airport figures cover every departure from PHL 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 AA1874 run worse on particular days?
Tuesday is historically the most reliable day and Friday the least, a gap of 10.7 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 AA1874 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 |
|---|---|---|---|
| DFW→ELP Dallas–Fort Worth to El Paso | October 3–6, 2024 | 2 | — |
| ELP→DFW El Paso to Dallas–Fort Worth | October 3–6, 2024 | 2 | — |
Because the same number has served different journeys, the statistics above describe only the route AA1874 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.
69 min late
against a median of 4 min early
AA1874 has an average that understates its risk: a typical arrival is 4 min early, but the worst tenth are 73 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 964 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 |
|---|---|---|---|---|
| YX5740 | Republic Airways | 92.5% | 14 min early | 757 |
| B61160 | JetBlue | 83.8% | 13 min early | 663 |
| AA1874 this flight | American Airlines | 71.9% | 4 min early | 964 |
| AA1776 | American Airlines | 68.7% | 4 min early | 765 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. AA1874 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 964 records of AA1874 operating PHL → 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
Analysis last recomputed