Flight number record
AA 1840
American Airlines · Charlotte to Houston
- Route
- CLT → IAH
- Departs
- 20:45
- Flights
- 282
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AA 1840, check with American Airlines.
AA 1840 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 282 flights, with a median arrival 3 minutes early.
Key figures
On time
73.6%
Arrivals under 15 minutes late, of 273 completed flights
Avg delay
95 min
Across delayed arrivals only, not all flights
Cancelled
2.84%
National rate is 1.89%
1 hour+ late
11.4%
National rate is 8.3%
These figures cover 282 flights between September 2025 and August 2026. Beyond the headline rate, 11.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When AA 1840 flies
AA 1840 flies CLT to IAH without a single fixed slot. Its most common scheduled departure was 20:45, used on 99 of 282 flights, with 22:01 (32 flights) and 09:27 (31 flights) next.
- Departs 20:4599 flights35.1%
- Departs 22:0132 flights11.3%
- Departs 09:2731 flights11.0%
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 1840 runs 4 points better at 73.6%. 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 1840 next to CLT to IAH
Every carrier on CLT to IAH combined arrived on time 79.2% of the time across 2,315 flights, so AA 1840 is 6 points behind it. American flew 1,608 flights on the same city pair under all its flight numbers, including this one, and those ran 78.4% on time. Across its whole network American Airlines managed 74.7%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AA 1840thin sample | 282 | 73.6% | 95 min | 2.84% | C |
| All American Airlines on CLT–IAH | 1,608 | 78.4% | 74 min | 1.49% | B |
| All carriers on CLT–IAH | 2,315 | 79.2% | 79 min | 1.94% | B |
| American Airlines, whole network | 988,892 | 74.7% | 85 min | 2.14% | C |
Across the year
AA 1840 quarter by quarter
AA 1840 did not run the same all year. Its best quarter was Jan–Mar 2026 at 87.5% on time and its weakest Jul–Sep 2026 at 56.7%, a swing of 31 points on roughly 71 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 202575 flights80.8%
- Jan–Mar 202637 flights87.5%
- Apr–Jun 202679 flights70.9%
- Jul–Sep 202661 flights56.7%
Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, AA 1840 did best on Tuesday at 83.7% on time and worst on Saturday at 58.1%. Each day rests on about 40 flights, so a gap of 26 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AA 1840 runs when it is late
AA 1840 often beats the schedule: 76 of 273 completed flights, 28%, arrived 15 minutes or more early. The 72 late arrivals split 20 under half an hour, 21 between 30 and 60 minutes, and 31 an hour or more.
- 15+ min early76 flights27.8%
- Within 15 min125 flights45.8%
- 15–29 min late20 flights7.3%
- 30–59 min late21 flights7.7%
- 1–2 hours late17 flights6.2%
- 2+ hours late14 flights5.1%
Scale runs 0% to 100%.
Share of 273 completed flights by arrival against schedule.
A late pushback is often recovered here: of 89 departures that left 15 minutes late or more, 28 still arrived on time. 11 flights left on time and still arrived late.
The worst days
Worst days for AA 1840
The latest arrival of the period was on 21 May 2026, 12 hours 16 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 May 2026 | 12 hours 16 minutes | Late-arriving aircraft |
| 18 June 2026 | 10 hours 21 minutes | Extreme weather |
| 30 November 2025 | 7 hours 42 minutes | Carrier |
| 14 September 2025 | 6 hours 58 minutes | Carrier |
| 30 May 2026 | 4 hours 21 minutes | Carrier |
Delay causes
Why AA 1840 runs late
Late-arriving aircraft accounts for 58% of the 6,834 delay minutes carriers reported here, and the remaining four split what is left.
- 58%Late-arriving aircraft
- 25%Carrier
- 11%Extreme weather
- 7%National Airspace System
58% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 6,834 reported delay minutes here, that single category outweighs weather by 5 to one. The split is drawn from 6,834 delay minutes reported on AA 1840.
Cancellations run at 2.84%, against 1.89% nationally. That is roughly one flight in 40 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
11.4% 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 912 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 four other city pairs in the data, including DFW to LEX (40), LEX to DFW (40) and IAH to CLT (38), but none flew often enough under AA 1840 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to CLT to IAH only.
One caution: this is a thin sample. 282 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 1840
For a booking, the cancellation rate is the figure to plan around on AA 1840: 2.84% of its 282 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- CLT to IAH, every carrier and departure
- IAH to CLT, the return direction
- United Airlines 575 on the same route88.9%
- Charlotte Douglas International (CLT) delay statistics
- George Bush Intercontinental (IAH) 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.