Carrier route record
AAMIA→BWI
American Airlines · Miami to Baltimore
- Flights
- 688
- Period
- July 2025 to June 2026
- Share of route
- 30%
- Carriers
- 5
Historical statistics for July 2025 to June 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, 8 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 688 flights, with a median arrival 4 minutes early.
The national on-time rate over the same period is 77.6%, so American on MIA to BWI runs 8 points behind the country as a whole. Across a thousand flights that is about 84 extra late arrivals.
Key figures
On time
69.2%
Arrivals under 15 minutes late, of 672 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
2.03%
National rate is 1.81%
Whole route
73.6%
Every carrier on MIA to BWI, 2,284 flights
These figures cover 688 flights between July 2025 and June 2026. Beyond the headline rate, 10.9% 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.
Carrier by carrier
American against every carrier on MIA to BWI
American flew 688 of the 2,284 flights on MIA to BWI, about 30% of it. Its 69.2% on time is 4 points worse than the route as a whole, which runs 73.6%. Ranked by on-time rate it is number four of five carriers on the route, where the range runs from Envoy at 90.4% to Spirit at 52.9%. 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 | 114 | 90.4% | 49 min | 0.00% | A+ |
| Southwest Airlines | 1,180 | 75.1% | 57 min | 2.03% | B |
| Frontier Airlinesthin sample | 265 | 74.2% | 90 min | 1.89% | C |
| American Airlines (this page) | 688 | 69.2% | 58 min | 2.03% | C |
| Spirit Airlinesthin sample | 37 | 52.9% | 107 min | 5.41% | F− |
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 32 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am66 flights95.2%
- 8am–11am40 flights92.5%
- 11am–2pm—
- 2pm–5pm218 flights66.7%
- 5pm–8pm—
- 8pm–5am364 flights63.5%
Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 63.5% on time, against 95.2% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8pm–5am window is the busiest, with 364 flights scheduled in it.
Across the year
American on MIA to BWI through the year
July is the worst month at 47.9% on time, 35 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 80.2% on time and Sunday the weakest at 63.7%. 17 points is a smaller lever than departure hour, but it is free.
Delay causes
Why American runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 47% of the 12,000 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.
- 47%Late-arriving aircraft
- 33%Carrier
- 17%National Airspace System
- 4%Extreme weather
- 1%Security
47% 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 12,000 reported delay minutes here, that single category outweighs weather by 13 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 12,085 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 95.2% on time here.
Cancellations sit at 2.03% against a national 1.81%, which is ordinary. Diversions add another 0.29%.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.9% 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.
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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 80.4% on time across 689 flights, 11 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 11 points of difference.
One caution: this is a thin sample. 688 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. 688 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 69.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 672 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 BWI90.4%
- Southwest Airlines on MIA to BWI75.1%
- Frontier Airlines on MIA to BWI74.2%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.