Flight number record
AA 1387
American Airlines · Chicago to Denver
- Route
- ORD → DEN
- Departs
- 20:45
- Flights
- 323
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AA 1387, check with American Airlines.
AA 1387 earns a D−, which is as low as this site's scale goes for a reason. Only 55.1% of flights arrive inside the 15-minute window, 22 points worse than the national rate of 77.3%. Late arrivals average a little over an hour. Treat any tight connection here as a coin flip. That rests on 323 flights, with a median arrival 9 minutes late.
The national on-time rate over the same period is 77.3%, so AA 1387 runs 22 points behind the country as a whole. Across a thousand flights that is about 222 extra late arrivals.
Key figures
On time
55.1%
Arrivals under 15 minutes late, of 312 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
3.41%
National rate is 1.89%
1 hour+ late
17.9%
National rate is 8.3%
These figures cover 323 flights between September 2025 and August 2026. Beyond the headline rate, 17.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When AA 1387 flies
AA 1387 flies ORD to DEN without a single fixed slot. Its most common scheduled departure was 20:45, used on 54 of 323 flights, with 20:52 (40 flights) and 22:35 (34 flights) next.
- Departs 20:4554 flights16.7%
- Departs 20:5240 flights12.4%
- Departs 22:3534 flights10.5%
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 20:45 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and AA 1387 runs 15 points worse at 55.1%. 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 1387 next to ORD to DEN
Every carrier on ORD to DEN combined arrived on time 74.3% of the time across 6,118 flights, so AA 1387 is 19 points behind it. American flew 1,475 flights on the same city pair under all its flight numbers, including this one, and those ran 65.5% on time. Across its whole network American Airlines managed 74.7%, which this flight trails by 20 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AA 1387thin sample | 323 | 55.1% | 69 min | 3.41% | D− |
| All American Airlines on ORD–DEN | 1,475 | 65.5% | 73 min | 1.56% | C |
| All carriers on ORD–DEN | 6,118 | 74.3% | 78 min | 1.19% | C |
| American Airlines, whole network | 988,892 | 74.7% | 85 min | 2.14% | C |
Across the year
AA 1387 quarter by quarter
AA 1387 did not run the same all year. Its best quarter was Oct–Dec 2025 at 66.7% on time and its weakest Jul–Sep 2026 at 42.1%, a swing of 25 points on roughly 81 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 202527 flights—
- Oct–Dec 202590 flights66.7%
- Jan–Mar 202653 flights63.5%
- Apr–Jun 202691 flights50.6%
- Jul–Sep 202662 flights42.1%
Scale runs 35% to 70%. Rows with fewer than 30 flights show a dash.
By weekday, AA 1387 did best on Tuesday at 68.9% on time and worst on Monday at 44.4%. Each day rests on about 46 flights, so a gap of 25 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AA 1387 runs when it is late
The 140 late arrivals split 38 under half an hour, 46 between 30 and 60 minutes, and 56 an hour or more.
- 15+ min early58 flights18.6%
- Within 15 min114 flights36.5%
- 15–29 min late38 flights12.2%
- 30–59 min late46 flights14.7%
- 1–2 hours late40 flights12.8%
- 2+ hours late16 flights5.1%
Scale runs 0% to 100%.
Share of 312 completed flights by arrival against schedule.
20 of 146 late departures made up the time and arrived on time, 14% of them. 14 flights left on time and still arrived late.
The worst days
Worst days for AA 1387
The latest arrival of the period was on 18 July 2026, 9 hours 17 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 July 2026 | 9 hours 17 minutes | Carrier |
| 30 May 2026 | 8 hours 31 minutes | Carrier |
| 8 December 2025 | 8 hours 2 minutes | Carrier |
| 10 March 2026 | 3 hours 42 minutes | Late-arriving aircraft |
| 30 December 2025 | 3 hours 6 minutes | Extreme weather |
Delay causes
Why AA 1387 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 9,624 reported delay minutes.
- 40%Late-arriving aircraft
- 39%Carrier
- 17%National Airspace System
- 4%Extreme weather
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 9,624 reported delay minutes here, that single category outweighs weather by 9 to one. The split is drawn from 9,624 delay minutes reported on AA 1387.
Cancellations run at 3.41%, against 1.89% 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
17.9% 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 888 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.
The same number turns up on one other city pair in the data, including BNA to DFW (37), but none flew often enough under AA 1387 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to DEN only.
One caution: this is a thin sample. 323 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 1387
For a booking, the cancellation rate is the figure to plan around on AA 1387: 3.41% of its 323 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.
Related
Where to go next
- ORD to DEN, every carrier and departure
- DEN to ORD, the return direction
- United Airlines 767 on the same route69.5%
- United Airlines 1803 on the same route84.5%
- Frontier Airlines 1483 on the same route65.2%
- Chicago O'Hare International (ORD) delay statistics
- Denver International (DEN) 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.