Flight number record
AA 684
American Airlines · Lihue to Phoenix
- Route
- LIH → PHX
- Departs
- 21:40
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AA 684, check with American Airlines.
AA 684 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 4.8 hours. That rests on 365 flights, with a median arrival 16 minutes early.
Set against the rest of the country, AA 684's record is 15 points better than the US average of 77.3%. That gap is worth roughly 150 fewer late arrivals for every thousand flights.
Key figures
On time
92.3%
Arrivals under 15 minutes late, of 362 completed flights
Avg delay
286 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
3.3%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 16 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When AA 684 flies
AA 684 flies LIH to PHX without a single fixed slot. Its most common scheduled departure was 21:40, used on 93 of 365 flights, with 21:00 (57 flights) and 21:30 (44 flights) next.
- Departs 21:4093 flights25.5%
- Departs 21:0057 flights15.6%
- Departs 21:3044 flights12.1%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 21:40 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and AA 684 runs 22 points better at 92.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
AA 684 next to LIH to PHX
Every carrier on LIH to PHX combined arrived on time 91.9% of the time across 384 flights, so AA 684 is about level with it. Across its whole network American Airlines managed 74.7%, which this flight beats by 18 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AA 684 | 365 | 92.3% | 286 min | 0.55% | A+ |
| All American Airlines on LIH–PHX | 384 | 91.9% | 261 min | 0.52% | A+ |
| All carriers on LIH–PHX | 384 | 91.9% | 261 min | 0.52% | A+ |
| American Airlines, whole network | 988,892 | 74.7% | 85 min | 2.14% | C |
Across the year
AA 684 quarter by quarter
AA 684 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Jan–Mar 2026 at 86.5%, a swing of 14 points on roughly 73 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights100.0%
- Oct–Dec 202592 flights93.4%
- Jan–Mar 202690 flights86.5%
- Apr–Jun 202691 flights95.6%
- Jul–Sep 202662 flights90.2%
Scale runs 80% to 100%.
By weekday, AA 684 ranged from 86.3% on Sunday to 96.2% on Monday. With about 52 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late AA 684 runs when it is late
AA 684 often beats the schedule: 192 of 362 completed flights, 53%, arrived 15 minutes or more early. The 28 late arrivals split 10 under half an hour, 6 between 30 and 60 minutes, and 12 an hour or more.
- 15+ min early192 flights53.0%
- Within 15 min142 flights39.2%
- 15–29 min late10 flights2.8%
- 30–59 min late6 flights1.7%
- 1–2 hours late5 flights1.4%
- 2+ hours late7 flights1.9%
Scale runs 0% to 100%.
Share of 362 completed flights by arrival against schedule.
3 of 20 late departures made up the time and arrived on time, 15% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for AA 684
The latest arrival of the period was on 10 May 2026, 25 hours 1 minute behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 May 2026 | 25 hours 1 minute | Carrier |
| 19 February 2026 | 21 hours 44 minutes | Late-arriving aircraft |
| 30 October 2025 | 19 hours 10 minutes | Late-arriving aircraft |
| 17 August 2026 | 18 hours 28 minutes | Carrier |
| 16 August 2026 | 17 hours 24 minutes | Late-arriving aircraft |
Delay causes
Why AA 684 runs late
Late-arriving aircraft accounts for 51% of the 8,001 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Late-arriving aircraft
- 44%Carrier
- 5%National Airspace System
- 0%Security
51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 8,001 reported delay minutes here, that single category outweighs weather by 51 to one. The split is drawn from 8,001 delay minutes reported on AA 684.
Cancellations are rare at 0.55%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.3% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 2,979 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 365 flights under AA 684 in the data flew LIH to PHX. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 365 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking AA 684
For a booking, AA 684 has one of the better records a US domestic flight can show: 92.3% on time and 0.55% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- Phoenix Sky Harbor International (PHX) delay statistics
- American Airlines on-time record
- Every American Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means American Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.