Carrier route record
AAMIA→BWI
American Airlines · Miami to Baltimore
- Flights
- 698
- Period
- September 2025 to August 2026
- Share of route
- 30%
- Carriers
- 5
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with American Airlines.
American on MIA to BWI sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 698 flights, with a median arrival 5 minutes early.
The national on-time rate over the same period is 77.3%, so American on MIA to BWI runs 7 points behind the country as a whole. Across a thousand flights that is about 65 extra late arrivals.
Key figures
On time
70.8%
Arrivals under 15 minutes late, of 677 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
2.01%
National rate is 1.89%
Whole route
73.5%
Every carrier on MIA to BWI, 2,291 flights
These figures cover 698 flights between September 2025 and August 2026. Beyond the headline rate, 10.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
American against every carrier on MIA to BWI
American flew 698 of the 2,291 flights on MIA to BWI, about 30% of it. Its 70.8% on time is 3 points worse than the route as a whole, which runs 73.5%. Ranked by on-time rate it is last of five carriers on the route, where the range runs from Envoy at 90.9% to American at 70.8%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Airthin sample | 121 | 90.9% | 49 min | 0.00% | A+ |
| Southwest Airlines | 1,188 | 73.6% | 54 min | 2.10% | C |
| Frontier Airlinesthin sample | 269 | 72.2% | 84 min | 3.35% | C− |
| Spirit Airlinesthin sample | 15 | 71.4% | 149 min | 6.67% | C− |
| American Airlines (this page) | 698 | 70.8% | 66 min | 2.01% | C |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When American runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 30 points, against half a point between the best and worst carrier.
- 5am–8am72 flights95.7%
- 8am–11am40 flights92.5%
- 11am–2pm—
- 2pm–5pm222 flights66.0%
- 5pm–8pm12 flights—
- 8pm–5am352 flights65.3%
Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 95.7% of the time, against 65.3% for the overnight window. That is 30 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 352 flights scheduled in it.
Across the year
American on MIA to BWI through the year
July is the worst month at 44.8% on time, 39 points below January, the best at 83.3%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. January was the busiest month here, with 85 flights.
Across the week, Tuesday is the strongest day at 81.5% on time and Sunday the weakest at 61.5%, a spread of 20 points.
Arrival by arrival
How late American on MIA to BWI runs when it is late
The 198 late arrivals split 67 under half an hour, 61 between 30 and 60 minutes, and 70 an hour or more.
- 15+ min early167 flights24.7%
- Within 15 min312 flights46.1%
- 15–29 min late67 flights9.9%
- 30–59 min late61 flights9.0%
- 1–2 hours late44 flights6.5%
- 2+ hours late26 flights3.8%
Scale runs 0% to 100%.
Share of 677 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 177 departures that left 15 minutes late or more, only 16 made it up before arrival. In the other direction, 37 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 BWI.
The worst days
Worst days for American on MIA to BWI
The latest arrival of the period was on 21 August 2026, 8 hours 42 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across August, November and July, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 August 2026 | 8 hours 42 minutes | National Airspace System |
| 26 November 2025 | 8 hours 39 minutes | Carrier |
| 9 July 2026 | 5 hours 29 minutes | National Airspace System |
| 28 July 2026 | 5 hours 20 minutes | Carrier |
| 1 August 2026 | 5 hours 10 minutes | Late-arriving aircraft |
Delay causes
Why American runs late on this route
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 13,000 reported delay minutes.
- 42%Late-arriving aircraft
- 32%Carrier
- 22%National Airspace System
- 5%Extreme weather
- 1%Security
42% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 13,000 reported delay minutes here, that single category outweighs weather by 9 to one. The split is drawn from 13,058 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 95.7% on time here.
Cancellations sit at 2.01% against a national 1.89%, which is ordinary. Diversions add another 1.00%.
Connections and stage length
What a delay here costs
10.3% 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 946 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 return leg is a different operation and performs like one: it runs 80.6% on time across 699 flights, 10 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 10 points of difference.
One caution: this is a thin sample. 698 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 American on MIA to BWI
Put together: treat all of this as provisional. 698 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 70.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 677 completed flights over 12 months sit behind that.
Related
Where to go next
- MIA to BWI, every carrier
- American on BWI to MIA, the return leg
- Envoy Air on MIA to BWI90.9%
- Southwest Airlines on MIA to BWI73.6%
- Frontier Airlines on MIA to BWI72.2%
- American Airlines network-wide record
- Miami International (MIA) delay statistics
- Baltimore/Washington International Thurgood Marshall (BWI) delay statistics
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
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.