Flight number record
AA 1366
American Airlines · Dallas-Fort Worth to Boston
- Route
- DFW → BOS
- Departs
- 19:15
- Flights
- 250
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AA 1366, check with American Airlines.
AA 1366 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 250 flights, with a median arrival 6 minutes late.
The national on-time rate over the same period is 77.3%, so AA 1366 runs 16 points behind the country as a whole. Across a thousand flights that is about 155 extra late arrivals.
Key figures
On time
61.8%
Arrivals under 15 minutes late, of 238 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
4.40%
National rate is 1.89%
1 hour+ late
14.7%
National rate is 8.3%
These figures cover 250 flights between September 2025 and August 2026. Beyond the headline rate, 14.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When AA 1366 flies
AA 1366 flies DFW to BOS without a single fixed slot. Its most common scheduled departure was 19:15, used on 44 of 250 flights, with 17:03 (41 flights) and 17:29 (33 flights) next.
- Departs 19:1544 flights17.6%
- Departs 17:0341 flights16.4%
- Departs 17:2933 flights13.2%
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 19:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and AA 1366 runs 6 points worse at 61.8%. 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 1366 next to DFW to BOS
Every carrier on DFW to BOS combined arrived on time 67.2% of the time across 3,695 flights, so AA 1366 is 5 points behind it. American flew 2,658 flights on the same city pair under all its flight numbers, including this one, and those ran 64.9% 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 1366thin sample | 250 | 61.8% | 61 min | 4.40% | D− |
| All American Airlines on DFW–BOS | 2,658 | 64.9% | 69 min | 3.27% | D− |
| All carriers on DFW–BOS | 3,695 | 67.2% | 73 min | 3.11% | C− |
| American Airlines, whole network | 988,892 | 74.7% | 85 min | 2.14% | C |
Across the year
AA 1366 quarter by quarter
AA 1366 did not run the same all year. Its best quarter was Apr–Jun 2026 at 70.0% on time and its weakest Oct–Dec 2025 at 59.8%, a swing of 10 points on roughly 83 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 flights—
- Oct–Dec 202584 flights59.8%
- Jan–Mar 202676 flights62.9%
- Apr–Jun 202652 flights70.0%
- Jul–Sep 20268 flights—
Scale runs 50% to 75%. Rows with fewer than 30 flights show a dash.
By weekday, AA 1366 did best on Friday at 74.3% on time and worst on Sunday at 43.2%. Each day rests on about 36 flights, so a gap of 31 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AA 1366 runs when it is late
The 91 late arrivals split 31 under half an hour, 25 between 30 and 60 minutes, and 35 an hour or more.
- 15+ min early37 flights15.5%
- Within 15 min110 flights46.2%
- 15–29 min late31 flights13.0%
- 30–59 min late25 flights10.5%
- 1–2 hours late28 flights11.8%
- 2+ hours late7 flights2.9%
Scale runs 0% to 100%.
Share of 238 completed flights by arrival against schedule.
23 of 97 late departures made up the time and arrived on time, 24% of them. In the other direction, 17 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 1366
The latest arrival of the period was on 18 October 2025, 5 hours 3 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 October 2025 | 5 hours 3 minutes | Late-arriving aircraft |
| 6 November 2025 | 4 hours 43 minutes | Late-arriving aircraft |
| 4 January 2026 | 4 hours 43 minutes | Late-arriving aircraft |
| 19 May 2026 | 4 hours 9 minutes | Late-arriving aircraft |
| 19 June 2026 | 3 hours 22 minutes | Late-arriving aircraft |
Delay causes
Why AA 1366 runs late
Late-arriving aircraft accounts for 57% of the 5,556 delay minutes carriers reported here, and the remaining four split what is left.
- 57%Late-arriving aircraft
- 21%National Airspace System
- 19%Carrier
- 3%Extreme weather
57% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,556 reported delay minutes here, that single category outweighs weather by 22 to one. The split is drawn from 5,556 delay minutes reported on AA 1366.
Cancellations run at 4.40%, against 1.89% nationally. That is roughly one flight in 25 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
14.7% 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.
At 1,562 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.
The same number turns up on seven other city pairs in the data, including ORD to CLT (6), LAX to ORD (4) and DFW to XNA (4), but none flew often enough under AA 1366 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DFW to BOS only.
One caution: this is a thin sample. 250 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 1366
For a booking, the cancellation rate is the figure to plan around on AA 1366: 4.40% of its 250 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- DFW to BOS, every carrier and departure
- BOS to DFW, the return direction
- American Airlines 1206 on the same route82.6%
- Delta Air Lines 2351 on the same route88.2%
- American Airlines 2306 on the same route54.1%
- Delta Air Lines 303 on the same route76.0%
- Dallas/Fort Worth International (DFW) 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.