Carrier route record
AABWI→MIA
American Airlines · Baltimore to Miami
- Flights
- 699
- 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 BWI to MIA lands a B, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That rests on 699 flights, with a median arrival 13 minutes early.
The US average over the same twelve months is 77.3%, 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
80.6%
Arrivals under 15 minutes late, of 676 completed flights
Avg delay
117 min
Across delayed arrivals only, not all flights
Cancelled
2.29%
National rate is 1.89%
Whole route
75.3%
Every carrier on BWI to MIA, 2,294 flights
These figures cover 699 flights between September 2025 and August 2026. Beyond the headline rate, 8.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
American against every carrier on BWI to MIA
American flew 699 of the 2,294 flights on BWI to MIA, about 30% of it. Its 80.6% on time is 5 points better than the route as a whole, which runs 75.3%. Ranked by on-time rate it is number two of five carriers on the route, where the range runs from Envoy at 81.8% to Spirit at 60.0%. 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 | 81.8% | 64 min | 0.00% | B+ |
| American Airlines (this page) | 699 | 80.6% | 117 min | 2.29% | B |
| Southwest Airlines | 1,189 | 72.6% | 53 min | 2.27% | C |
| Frontier Airlinesthin sample | 269 | 71.1% | 87 min | 4.46% | C− |
| Spirit Airlinesthin sample | 16 | 60.0% | 46 min | 6.25% | D− |
Flight by flight
American flight numbers on BWI to MIA
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 27 points, against half a point between the best and worst carrier.
- 5am–8am365 flights90.5%
- 8am–11am72 flights83.8%
- 11am–2pm40 flights78.9%
- 2pm–5pm—
- 5pm–8pm222 flights63.2%
- 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: 63.2% on time, against 90.5% 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
August is the worst month at 61.4% on time, 39 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, Thursday is the strongest day at 84.7% on time and Friday the weakest at 74.3%, a spread of 10 points.
Arrival by arrival
How late American on BWI to MIA runs when it is late
American on BWI to MIA often beats the schedule: 323 of 676 completed flights, 48%, arrived 15 minutes or more early. The 131 late arrivals split 42 under half an hour, 33 between 30 and 60 minutes, and 56 an hour or more.
- 15+ min early323 flights47.8%
- Within 15 min222 flights32.8%
- 15–29 min late42 flights6.2%
- 30–59 min late33 flights4.9%
- 1–2 hours late28 flights4.1%
- 2+ hours late28 flights4.1%
Scale runs 0% to 100%.
Share of 676 completed flights by arrival against schedule.
32 of 137 late departures made up the time and arrived on time, 23% of them. 26 flights left on time and still arrived late.
The worst days
Worst days for American on BWI to MIA
The latest arrival of the period was on 15 April 2026, 20 hours 14 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 April 2026 | 20 hours 14 minutes | Carrier |
| 26 January 2026 | 16 hours 50 minutes | Extreme weather |
| 9 July 2026 | 15 hours 17 minutes | Carrier |
| 7 August 2026 | 14 hours 53 minutes | Carrier |
| 24 August 2026 | 13 hours 29 minutes | Carrier |
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 15,000 reported delay minutes.
- 42%Carrier
- 38%Late-arriving aircraft
- 11%Extreme weather
- 9%National Airspace System
38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 15,000 reported delay minutes here, that single category outweighs weather by 3 to one. The split is drawn from 15,373 reported delay minutes.
The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 6,417 of the 15,000 delay minutes reported here.
Cancellations sit at 2.29% against a national 1.89%, which is ordinary. Diversions add another 1.00%.
Connections and stage length
What a delay here costs
8.3% of arrivals land an hour or more late, close to the national 8.3%, so 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.
The return leg is a different operation and performs like one: it runs 70.8% on time across 698 flights, 10 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 10 points of difference.
One caution: this is a thin sample. 699 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. 699 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 80.6% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 676 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 MIA81.8%
- Southwest Airlines on BWI to MIA72.6%
- Frontier Airlines on BWI to MIA71.1%
- 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 7.05 million flight records
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.