Flight profile · American Airlines
AA1638
Phoenix (PHX) to Denver (DEN) · scheduled 7:13 PM – 9:52 PM
How AA1638 performs
505 operations, 2023-11-05 to 2026-06-30.
AA1638 arrived on time 73.8% of the time, against 79.0% for all PHX → DEN 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 2.3 points worse.
Source: US DOT Bureau of Transportation Statistics · 505 operations between 2023-11-05 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AA1638 | 73.8% | 0.20% | -5 min | 9.7% | 505 |
| American Airlines on PHX → DEN | 76.1% | 0.48% | -5 min | 9.5% | 2,904 |
| All PHX → DEN flights | 79.0% | 0.91% | -5 min | 7.2% | 27,770 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-11-05 to 2026-06-30
Other routes AA1638 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 |
|---|---|---|---|
| DEN→PHX Denver to Phoenix | 2026-05-21 – 2026-06-30 | 40 | — |
| DFW→CHS Dallas–Fort Worth to Charleston | 2023-07-01 – 2026-04-06 | 357 | 67.4% |
| CHS→DFW Charleston to Dallas–Fort Worth | 2023-07-01 – 2026-04-06 | 324 | 68.4% |
| DFW→RNO Dallas–Fort Worth to Reno | 2026-02-14 – 2026-03-07 | 13 | — |
| DFW→ORD Dallas–Fort Worth to Chicago | 2026-01-06 – 2026-02-11 | 37 | — |
| ABQ→PHX Albuquerque to Phoenix | 2025-11-03 – 2025-11-17 | 5 | — |
| DFW→LAX Dallas–Fort Worth to Los Angeles | 2024-01-23 – 2024-01-27 | 5 | — |
Because the same number has served different journeys, the statistics above describe only the route AA1638 currently operates. Blending them would produce an average of two different flights.
Why AA1638 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, fuelling — 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 AA1638 on PHX → DEN. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on PHX → DEN
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| F91376 | Frontier Airlines | 88.2% | 10 min early | 809 |
| F92142 | Frontier Airlines | 69.6% | 3 min early | 735 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 505 records of AA1638 operating PHX → 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.
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