Flight number record
AA 1054
American Airlines · Miami to Boston
- Route
- MIA → BOS
- Departs
- 21:45
- Flights
- 361
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s AA 1054, check with American Airlines.
AA 1054 draws a D. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 361 flights, with a median arrival 4 minutes late.
The national on-time rate over the same period is 77.6%, so AA 1054 runs 16 points behind the country as a whole. Across a thousand flights that is about 162 extra late arrivals.
Key figures
On time
61.4%
Arrivals under 15 minutes late, of 350 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
2.49%
National rate is 1.81%
1 hour+ late
14.6%
National rate is 8.1%
These figures cover 361 flights between July 2025 and June 2026. Beyond the headline rate, 14.6% 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 1054 flies
AA 1054 flies MIA to BOS without a single fixed slot. Its most common scheduled departure was 21:45, used on 193 of 361 flights, with 21:40 (64 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 21:45193 flights53.5%
- Departs 21:4064 flights17.7%
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 21:45 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and AA 1054 runs 9 points worse at 61.4%. 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 1054 next to MIA to BOS
Every carrier on MIA to BOS combined arrived on time 69.7% of the time across 3,415 flights, so AA 1054 is 8 points behind it. American flew 2,230 flights on the same city pair under all its flight numbers, including this one, and those ran 70.7% on time. Across its whole network American Airlines managed 74.4%, which this flight trails by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AA 1054thin sample | 361 | 61.4% | 67 min | 2.49% | D |
| All American Airlines on MIA–BOS | 2,230 | 70.7% | 71 min | 1.75% | C |
| All carriers on MIA–BOS | 3,415 | 69.7% | 73 min | 2.40% | C |
| American Airlines, whole network | 986,297 | 74.4% | 85 min | 2.29% | C |
Across the year
AA 1054 quarter by quarter
AA 1054 did not run the same all year. Its best quarter was Jul–Sep 2025 at 70.5% on time and its weakest Jan–Mar 2026 at 50.6%, a swing of 20 points on roughly 90 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 202591 flights70.5%
- Oct–Dec 202589 flights70.1%
- Jan–Mar 202690 flights50.6%
- Apr–Jun 202691 flights54.4%
Scale runs 40% to 75%. Rows with fewer than 30 flights show a dash.
By weekday, AA 1054 ranged from 55.1% on Monday to 66.0% on Thursday. With about 52 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why AA 1054 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 54% of the 9,104 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.
- 54%Late-arriving aircraft
- 35%Carrier
- 10%National Airspace System
- 2%Extreme weather
54% 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 9,104 reported delay minutes here, that single category outweighs weather by 33 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 9,104 delay minutes reported on AA 1054.
Cancellations sit at 2.49% against a national 1.81%, which is ordinary. Diversions add another 0.55%.
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. 14.6% 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 1,258 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.
Every one of the 361 flights under AA 1054 in the data flew MIA to BOS. 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. 361 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 1054
For a booking, AA 1054 is a flight to put a long connection behind. 14.6% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- MIA to BOS, every carrier and departure
- BOS to MIA, the return direction
- American Airlines 1074 on the same route58.8%
- American Airlines 2539 on the same route60.3%
- Miami International (MIA) delay statistics
- Boston Logan International (BOS) 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.