Flight number record

AA 1366

American Airlines · Dallas-Fort Worth to Boston

Route: DFW → BOS
Departs: 19:15
Flights: 303
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 a little over an hour behind schedule. Build slack into anything you connect to. That rests on 303 flights, with a median arrival 6 minutes late.

The national on-time rate over the same period is 77.6%, so AA 1366 runs 15 points behind the country as a whole. Across a thousand flights that is about 154 extra late arrivals.

On time

62.2%

Arrivals under 15 minutes late, of 288 completed flights

Avg delay

70 min

Across delayed arrivals only, not all flights

Cancelled

4.62%

National rate is 1.81%

1 hour+ late

15.6%

National rate is 8.1%

These figures cover 303 flights between July 2025 and June 2026. Beyond the headline rate, 15.6% 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 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 303 flights, with 17:03 (41 flights) and 18:58 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 19:1544 flights14.5%
Departs 17:0341 flights13.5%
Departs 18:5835 flights11.6%

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 19:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and AA 1366 runs 6 points worse at 62.2%. 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 1366 next to DFW to BOS

Every carrier on DFW to BOS combined arrived on time 67.1% of the time across 3,744 flights, so AA 1366 is 5 points behind it. American flew 2,639 flights on the same city pair under all its flight numbers, including this one, and those ran 64.7% on time. Across its whole network American Airlines managed 74.4%, which this flight trails by 12 points.

AA 1366 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AA 1366thin sample	303	62.2%	70 min	4.62%	D−
All American Airlines on DFW–BOS	2,639	64.7%	69 min	3.45%	D−
All carriers on DFW–BOS	3,744	67.1%	76 min	3.21%	C−
American Airlines, whole network	986,297	74.4%	85 min	2.29%	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 Jul–Sep 2025 at 59.3%, a swing of 11 points on roughly 76 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 flights59.3%
Oct–Dec 202584 flights59.8%
Jan–Mar 202676 flights62.9%
Apr–Jun 202652 flights70.0%

Scale runs 50% to 75%. Rows with fewer than 30 flights show a dash.

By weekday, AA 1366 did best on Thursday at 69.8% on time and worst on Tuesday at 52.6%. Each day rests on about 43 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why AA 1366 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 52% of the 7,656 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.

Late-arriving aircraft
52%
Carrier
21%
National Airspace System
20%
Extreme weather
6%

52% 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 7,656 reported delay minutes here, that single category outweighs weather by 8 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 7,656 delay minutes reported on AA 1366.

Cancellations run at 4.62%, against 1.81% nationally. That is roughly one flight in twenty 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. 15.6% 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.

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 four other city pairs in the data, including ORD to CLT (6), LAX to ORD (4) and ATL to MIA (2), 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. 303 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: 4.62% of its 303 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.

Where to go next

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.

Key figures