Carrier route record
AABWI→MIA
American Airlines · Baltimore to Miami
- Flights
- 689
- 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 BWI to MIA lands a B, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 689 flights, with a median arrival 12 minutes early.
The US average over the same twelve months is 77.6%, so there is little to separate American on BWI to MIA from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
80.4%
Arrivals under 15 minutes late, of 669 completed flights
Avg delay
101 min
Across delayed arrivals only, not all flights
Cancelled
2.32%
National rate is 1.81%
Whole route
74.7%
Every carrier on BWI to MIA, 2,286 flights
These figures cover 689 flights between July 2025 and June 2026. The median arrival is 12 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Carrier by carrier
American against every carrier on BWI to MIA
American flew 689 of the 2,286 flights on BWI to MIA, about 30% of it. Its 80.4% on time is 6 points better than the route as a whole, which runs 74.7%. Ranked by on-time rate it is number two of five carriers on the route, where the range runs from Envoy at 81.6% to Spirit at 61.1%. 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 | 81.6% | 62 min | 0.00% | B+ |
| American Airlines (this page) | 689 | 80.4% | 101 min | 2.32% | B |
| Southwest Airlines | 1,181 | 72.3% | 59 min | 1.86% | C |
| Frontier Airlinesthin sample | 265 | 69.4% | 89 min | 3.40% | C− |
| Spirit Airlinesthin sample | 37 | 61.1% | 64 min | 2.70% | D |
Flight by flight
American flight numbers on BWI to MIA
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 25 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–8am365 flights89.1%
- 8am–11am66 flights87.3%
- 11am–2pm40 flights78.9%
- 2pm–5pm—
- 5pm–8pm218 flights63.8%
- 8pm–5am—
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 63.8% on time, against 89.1% 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 5am–8am window is the busiest, with 365 flights scheduled in it.
Across the year
American on BWI to MIA through the year
July is the worst month at 60.4% on time, 40 points below September, the best at 100.0%. 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, Monday is the strongest day at 84.2% on time and Friday the weakest at 75.2%. 9 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. Carrier accounts for 46% of the 13,000 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.
- 46%Carrier
- 33%Late-arriving aircraft
- 11%National Airspace System
- 9%Extreme weather
- 0%Security
The largest share of delay minutes, 46%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 6,110 of the 13,000 delay minutes reported here. The split is drawn from 13,207 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 89.1% on time here.
Cancellations sit at 2.32% against a national 1.81%, which is ordinary. Diversions add another 0.58%.
Connections and stage length
What a delay here costs
7.6% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last close to two hours, which a normal layover absorbs.
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 69.2% on time across 688 flights, 11 points below 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. 689 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 BWI to MIA
Put together: treat all of this as provisional. 689 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 80.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 669 completed flights over 12 months sit behind that.
Related
Where to go next
- BWI to MIA, every carrier
- American on MIA to BWI, the return leg
- Envoy Air on BWI to MIA81.6%
- Southwest Airlines on BWI to MIA72.3%
- Frontier Airlines on BWI to MIA69.4%
- American Airlines network-wide record
- Baltimore/Washington International Thurgood Marshall (BWI) delay statistics
- Miami International (MIA) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
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.