Flight profile · American Airlines
AA1666
Phoenix (PHX) to Ontario (ONT) · scheduled 6:06 PM – 6:20 PM
How AA1666 performs
625 operations, November 2023 – August 2026.
Between its first and last recorded date on PHX → ONT, AA1666 averaged about 4 operations a week (625 in 1,031 days, cancelled ones included).
AA1666 arrived on time 75.5% of the time, against 79.8% for all PHX → ONT flights, so this departure is 4.3 percentage points worse than the route as a whole. Against American Airlines’ own flights on this route it is 4.6 points worse.
Source: US DOT Bureau of Transportation Statistics · 625 operations, November 2023 – August 2026 · If AA1666 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where AA1666 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 |
|---|---|---|---|---|---|
| AA1666 | 75.5% | 0.48% | -6 min | 10.1% | 625 |
| American Airlines on PHX → ONT | 80.1% | 0.48% | -6 min | 7.4% | 3,557 |
| All PHX → ONT flights | 79.8% | 0.38% | -5 min | 6.0% | 9,922 |
AA1666 cancelled 3 of 625 operations (0.48%), close to the 0.38% for PHX → ONT.
10.1% of AA1666’s arrivals were an hour or more late, against 6.0% across PHX → ONT, so the long delays are more common on this number than on the route.
Source: FlyerIntel analysis of US DOT BTS data · November 2023 – August 2026
Why AA1666 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 AA1666 on PHX → ONT. Only delays of 15 minutes or more are attributed. What the five causes mean
Source: US DOT Bureau of Transportation Statistics · Data covering November 2023 – August 2026
Does a late aircraft delay this flight?
How often the plane that flies AA1666 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, AA1666 pushed back an average of 30 minutes late; when it came in on time or early, an average of 2 minutes late.
Matched by tail number to the aircraft’s previous flight into PHX: 556 of 622 departures. Unknown, cancelled or diverted inbounds and gaps over 12 hours are left out.
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 |
|---|---|---|---|
| AA1666 | 23% | 53% | 11% |
| Network, same turn | 17% | 69% | 9% |
71 scheduled minutes is enough to clean and board when the aircraft is on time, with little to spare when it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often AA1666’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often AA1666 left 15 or more minutes late is lower than the network’s.
Source: US DOT Bureau of Transportation Statistics · Data covering November 2023 – August 2026
From pushback to gate
When it leaves PHX late, does that still matter by the time it reaches ONT?
AA1666 pushes back an average of 15.1 minutes late and reaches the gate at ONT an average of 10.0 minutes late. The 5.0 minutes between those two figures are slack the published schedule already carries, so a late pushback is partly, not fully, made up before the gate. Its 14.4 minutes on the taxiways at PHX is about what any departure from the airport in that hour spends.
On arrival at ONT, AA1666 spends 5.6 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 ONT spends on the ground before reaching the gate.
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 31,262 PHX departures. Taxi-in is landing to gate, set against 82,178 arrivals at ONT. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · November 2023 – August 2026
The hour it leaves PHX
AA1666 has one departure time, 6:06 PM, so this is what that hour at PHX is worth.
On-time arrival rate. 31,262 departures from PHX are scheduled in the 6 PM–7 PM hour over the period, against 613,275 across the whole day.
AA1666 is scheduled out of PHX at 6:06 PM, in the 6 PM–7 PM bank. Departures from PHX in that hour arrive on time 71.3% of the time against 80.2% across the airport’s whole day — the slot alone is worth 8.9 points worse before anything about this particular flight is considered.
Both airport figures cover every destination from PHX, so they describe the slot, not this journey; the route comparison is above. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · November 2023 – August 2026 · Hours below 120 departures are not scored.
Other routes AA1666 has flown
Carriers reassign flight numbers. AA1666 also served these 7 other city pairs in the period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| ONT→PHX Ontario to Phoenix | November 5, 2023 – August 30, 2026 | 402 | 76.6% |
| CHS→CLT Charleston to Charlotte | May 21, 2026 – August 4, 2026 | 65 | — |
| CLT→CHS Charlotte to Charleston | May 21, 2026 – August 4, 2026 | 65 | — |
| ORD→LAX Chicago to Los Angeles | April 7, 2026 – May 20, 2026 | 44 | — |
| DCA→MCO Washington to Orlando | July 1, 2023 – November 4, 2024 | 342 | 90.7% |
| PHX→TUS Phoenix to Tucson | December 20, 2023 – January 7, 2024 | 17 | — |
| TUS→PHX Tucson to Phoenix | December 20, 2023 – January 7, 2024 | 17 | — |
The figures above describe only PHX → ONT, the route AA1666 flies now.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
60 min late
against a median of 6 min early
AA1666 has an average that understates its risk: a typical arrival is 6 min early, but the worst tenth are 66 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 625 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering November 2023 – August 2026
Data and methodology
Calculated by FlyerIntel from 625 records of AA1666 operating PHX → ONT, 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 reported separately, not in the on-time rate.
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