Flight number record
AA 1921
American Airlines · Miami to Tampa
- Route
- MIA → TPA
- Departs
- 20:53
- Flights
- 321
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AA 1921, check with American Airlines.
AA 1921 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 321 flights, with a median arrival 4 minutes late.
The national on-time rate over the same period is 77.3%, so AA 1921 runs 17 points behind the country as a whole. Across a thousand flights that is about 172 extra late arrivals.
Key figures
On time
60.1%
Arrivals under 15 minutes late, of 318 completed flights
Avg delay
79 min
Across delayed arrivals only, not all flights
Cancelled
0.93%
National rate is 1.89%
1 hour+ late
20.1%
National rate is 8.3%
These figures cover 321 flights between September 2025 and August 2026. Beyond the headline rate, 20.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When AA 1921 flies
AA 1921 flies MIA to TPA without a single fixed slot. Its most common scheduled departure was 20:53, used on 90 of 321 flights, with 20:40 (61 flights) and 20:50 (34 flights) next.
- Departs 20:5390 flights28.0%
- Departs 20:4061 flights19.0%
- Departs 20:5034 flights10.6%
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 20:53 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and AA 1921 runs 10 points worse at 60.1%. 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 1921 next to MIA to TPA
Every carrier on MIA to TPA combined arrived on time 71.5% of the time across 2,927 flights, so AA 1921 is 11 points behind it. American flew 2,518 flights on the same city pair under all its flight numbers, including this one, and those ran 70.1% on time. Across its whole network American Airlines managed 74.7%, which this flight trails by 15 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AA 1921thin sample | 321 | 60.1% | 79 min | 0.93% | D+ |
| All American Airlines on MIA–TPA | 2,518 | 70.1% | 80 min | 0.68% | C+ |
| All carriers on MIA–TPA | 2,927 | 71.5% | 77 min | 1.06% | C |
| American Airlines, whole network | 988,892 | 74.7% | 85 min | 2.14% | C |
Across the year
AA 1921 quarter by quarter
AA 1921 did not run the same all year. Its best quarter was Jul–Sep 2025 at 76.7% on time and its weakest Apr–Jun 2026 at 53.2%, a swing of 24 points on roughly 64 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 flights76.7%
- Oct–Dec 202592 flights65.2%
- Jan–Mar 202690 flights55.7%
- Apr–Jun 202647 flights53.2%
- Jul–Sep 202662 flights55.7%
Scale runs 45% to 80%.
By weekday, AA 1921 did best on Wednesday at 66.7% on time and worst on Sunday at 53.3%. Each day rests on about 46 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AA 1921 runs when it is late
When AA 1921 is late it tends to be very late: 64 of its 127 late arrivals were an hour or more behind, and 19 were two hours or more.
- 15+ min early53 flights16.7%
- Within 15 min138 flights43.4%
- 15–29 min late29 flights9.1%
- 30–59 min late34 flights10.7%
- 1–2 hours late45 flights14.2%
- 2+ hours late19 flights6.0%
Scale runs 0% to 100%.
Share of 318 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 123 departures that left 15 minutes late or more, only 11 made it up before arrival. 15 flights left on time and still arrived late.
The worst days
Worst days for AA 1921
The latest arrival of the period was on 2 December 2025, 10 hours behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 2 December 2025 | 10 hours | Carrier |
| 8 December 2025 | 4 hours 28 minutes | Carrier |
| 31 May 2026 | 4 hours 27 minutes | Late-arriving aircraft |
| 7 December 2025 | 4 hours 4 minutes | Extreme weather |
| 19 June 2026 | 4 hours | Late-arriving aircraft |
Delay causes
Why AA 1921 runs late
Late-arriving aircraft accounts for 47% of the 10,000 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Late-arriving aircraft
- 36%Carrier
- 10%National Airspace System
- 7%Extreme weather
47% 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 6 to one. The split is drawn from 10,046 delay minutes reported on AA 1921.
Cancellations sit at 0.93% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
20.1% 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 same number turns up on one other city pair in the data, including DCA to JAX (44), but none flew often enough under AA 1921 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MIA to TPA only.
One caution: this is a thin sample. 321 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 1921
For a booking, AA 1921 is a flight to put a long connection behind. 20.1% 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 TPA, every carrier and departure
- TPA to MIA, the return direction
- Miami International (MIA) delay statistics
- Tampa International (TPA) 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.