Flight number record
AA 1074
American Airlines · Miami to Boston
- Route
- MIA → BOS
- Departs
- 17:35
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AA 1074, check with American Airlines.
AA 1074 draws a D. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 364 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so AA 1074 runs 16 points behind the country as a whole. Across a thousand flights that is about 158 extra late arrivals.
Key figures
On time
61.5%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
1.65%
National rate is 1.89%
1 hour+ late
14.8%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. Beyond the headline rate, 14.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When AA 1074 flies
AA 1074 flies MIA to BOS without a single fixed slot. Its most common scheduled departure was 17:35, used on 44 of 364 flights, with 17:40 (42 flights) and 18:50 (42 flights) next.
- Departs 17:3544 flights12.1%
- Departs 17:4042 flights11.5%
- Departs 18:5042 flights11.5%
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 17:35 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and AA 1074 runs 7 points worse at 61.5%. 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 1074 next to MIA to BOS
Every carrier on MIA to BOS combined arrived on time 69.8% of the time across 3,366 flights, so AA 1074 is 8 points behind it. American flew 2,271 flights on the same city pair under all its flight numbers, including this one, and those ran 71.1% on time. Across its whole network American Airlines managed 74.7%, which this flight trails by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AA 1074thin sample | 364 | 61.5% | 75 min | 1.65% | D |
| All American Airlines on MIA–BOS | 2,271 | 71.1% | 70 min | 1.67% | C |
| All carriers on MIA–BOS | 3,366 | 69.8% | 72 min | 2.20% | C |
| American Airlines, whole network | 988,892 | 74.7% | 85 min | 2.14% | C |
Across the year
AA 1074 quarter by quarter
AA 1074 did not run the same all year. Its best quarter was Jan–Mar 2026 at 67.1% on time and its weakest Jul–Sep 2025 at 46.7%, a swing of 20 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 flights46.7%
- Oct–Dec 202591 flights63.3%
- Jan–Mar 202690 flights67.1%
- Apr–Jun 202691 flights62.6%
- Jul–Sep 202662 flights56.5%
Scale runs 40% to 75%.
By weekday, AA 1074 did best on Saturday at 74.5% on time and worst on Sunday at 48.0%. Each day rests on about 52 flights, so a gap of 27 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AA 1074 runs when it is late
AA 1074 often beats the schedule: 92 of 358 completed flights, 26%, arrived 15 minutes or more early. The 138 late arrivals split 33 under half an hour, 52 between 30 and 60 minutes, and 53 an hour or more.
- 15+ min early92 flights25.7%
- Within 15 min128 flights35.8%
- 15–29 min late33 flights9.2%
- 30–59 min late52 flights14.5%
- 1–2 hours late37 flights10.3%
- 2+ hours late16 flights4.5%
Scale runs 0% to 100%.
Share of 358 completed flights by arrival against schedule.
17 of 130 late departures made up the time and arrived on time, 13% of them. In the other direction, 25 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at BOS.
The worst days
Worst days for AA 1074
The latest arrival of the period was on 23 February 2026, 16 hours 3 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 23 February 2026 | 16 hours 3 minutes | Late-arriving aircraft |
| 18 July 2026 | 14 hours 27 minutes | Carrier |
| 1 July 2026 | 5 hours 15 minutes | Late-arriving aircraft |
| 21 July 2026 | 3 hours 33 minutes | National Airspace System |
| 7 February 2026 | 3 hours 10 minutes | Carrier |
Delay causes
Why AA 1074 runs late
Late-arriving aircraft accounts for 44% of the 10,000 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Late-arriving aircraft
- 31%National Airspace System
- 16%Carrier
- 8%Extreme weather
- 0%Security
44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 10,000 reported delay minutes here, that single category outweighs weather by 5 to one. The split is drawn from 10,380 delay minutes reported on AA 1074.
Cancellations sit at 1.65% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
14.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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.
Every one of the 364 flights under AA 1074 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. 364 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 1074
For a booking, AA 1074 is a flight to put a long connection behind. 14.8% 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 1054 on the same route58.0%
- American Airlines 2539 on the same route57.8%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.