Flight profile · American Airlines
AA1578
Boston (BOS) to Los Angeles (LAX) · scheduled 6:00 PM – 9:21 PM
How AA1578 performs
518 operations, 2023-11-05 to 2026-06-30.
AA1578 arrived on time 72.3% of the time, against 77.5% for all BOS → LAX flights — this specific departure is 5.2 percentage points worse than the route as a whole. Against American Airlines’s own flights on this route it is 5.3 points worse.
Source: US DOT Bureau of Transportation Statistics · 518 operations between 2023-11-05 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AA1578 | 72.3% | 0.19% | -4 min | 12.0% | 518 |
| American Airlines on BOS → LAX | 77.7% | 0.71% | -9 min | 8.6% | 3,078 |
| All BOS → LAX flights | 77.5% | 0.76% | -7 min | 8.3% | 13,833 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-11-05 to 2026-06-30
Other routes AA1578 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→SDF Philadelphia to Louisville | 2026-05-03 – 2026-05-03 | 1 | — |
| DCA→BOS Washington to Boston | 2026-03-08 – 2026-04-06 | 30 | — |
| ORD→MIA Chicago to Miami | 2026-02-12 – 2026-03-07 | 24 | — |
| DFW→PHX Dallas–Fort Worth to Phoenix | 2026-01-06 – 2026-02-11 | 37 | — |
| JAC→ORD Jackson to Chicago | 2025-12-18 – 2026-01-05 | 19 | — |
| DFW→LAX Dallas–Fort Worth to Los Angeles | 2025-12-03 – 2025-12-17 | 15 | — |
| PHX→CLT Phoenix to Charlotte | 2025-11-03 – 2025-12-02 | 29 | — |
| LAS→PHL Las Vegas to Philadelphia | 2025-11-01 – 2025-11-01 | 1 | — |
| PHX→SDF Phoenix to Louisville | 2025-05-01 – 2025-05-04 | 2 | — |
| SDF→PHX Louisville to Phoenix | 2025-05-01 – 2025-05-04 | 2 | — |
| LAX→BOS Los Angeles to Boston | 2023-11-05 – 2025-03-29 | 241 | 86.2% |
| DFW→MSP Dallas–Fort Worth to Minneapolis | 2023-10-05 – 2024-11-04 | 214 | 57.0% |
| STL→DFW St. Louis to Dallas–Fort Worth | 2023-07-01 – 2023-09-05 | 65 | — |
Because the same number has served different journeys, the statistics above describe only the route AA1578 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 518 records of AA1578 operating BOS → LAX, 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.