Flight number record
AA 688
American Airlines · New York to Miami
- Route
- JFK → MIA
- Departs
- 17:20
- Flights
- 255
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s AA 688, check with American Airlines.
AA 688 lands a B−, level with the national rate of 77.6%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 255 flights, with a median arrival 8 minutes early.
Key figures
On time
77.6%
Arrivals under 15 minutes late, of 246 completed flights
Avg delay
101 min
Across delayed arrivals only, not all flights
Cancelled
3.53%
National rate is 1.81%
1 hour+ late
11.0%
National rate is 8.1%
These figures cover 255 flights between July 2025 and June 2026. Beyond the headline rate, 11.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When AA 688 flies
AA 688 flies JFK to MIA without a single fixed slot. Its most common scheduled departure was 17:20, used on 41 of 255 flights, with 11:31 (37 flights) and 11:00 (33 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 17:2041 flights16.1%
- Departs 11:3137 flights14.5%
- Departs 11:0033 flights12.9%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 17:20 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and AA 688 runs 9 points better at 77.6%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
AA 688 next to JFK to MIA
Every carrier on JFK to MIA combined arrived on time 77.3% of the time across 4,553 flights, so AA 688 is about level with it. American flew 2,659 flights on the same city pair under all its flight numbers, including this one, and those ran 77.8% on time. Across its whole network American Airlines managed 74.4%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AA 688thin sample | 255 | 77.6% | 101 min | 3.53% | B− |
| All American Airlines on JFK–MIA | 2,659 | 77.8% | 103 min | 2.71% | B |
| All carriers on JFK–MIA | 4,553 | 77.3% | 93 min | 2.88% | B |
| American Airlines, whole network | 986,297 | 74.4% | 85 min | 2.29% | C |
Across the year
AA 688 quarter by quarter
Quarter by quarter AA 688 held fairly steady: 82.6% in Oct–Dec 2025, 75.6% in Jan–Mar 2026 and 76.1% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202528 flights—
- Oct–Dec 202590 flights82.6%
- Jan–Mar 202690 flights75.6%
- Apr–Jun 202647 flights76.1%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, AA 688 did best on Tuesday at 87.9% on time and worst on Sunday at 61.1%. Each day rests on about 36 flights, so a gap of 27 points is worth noticing but could still narrow in another year.
Delay causes
Why AA 688 runs late
One category carries most of the weight here. Carrier accounts for 44% of the 5,547 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 44%Carrier
- 40%Late-arriving aircraft
- 15%National Airspace System
- 2%Extreme weather
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 5,547 reported delay minutes here, that single category outweighs weather by 17 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 5,547 delay minutes reported on AA 688.
Cancellations run at 3.53%, against 1.81% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 1,089 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on one other city pair in the data, including MIA to JFK (36), but none flew often enough under AA 688 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to JFK to MIA only.
One caution: this is a thin sample. 255 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 688
For a booking, the cancellation rate is the figure to plan around on AA 688: 3.53% of its 255 scheduled flights did not operate. A late arrival costs close to two hours, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- JFK to MIA, every carrier and departure
- MIA to JFK, the return direction
- American Airlines 2017 on the same route86.0%
- Delta Air Lines 1514 on the same route79.2%
- Delta Air Lines 1528 on the same route84.2%
- Delta Air Lines 1428 on the same route68.2%
- Frontier Airlines 1809 on the same route79.4%
- John F. Kennedy International (JFK) delay statistics
- Miami International (MIA) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.