Route profile
BWI→MIA
Flight reliability, delays and best times to fly from Baltimore to Miami, 946 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 19% of comparable major US routes (4,598 compared)
Calculated from 7,378 flights. How this is calculated
BWI → MIA arrives on time 74.2% of the time; the return trip, MIA → BWI, arrives on time 75.2% of the time.
BWI → MIA spends 24.7 minutes on the ground on a 946-mile trip: 16.5 minutes from pushback to wheels-up at BWI and 8.2 minutes from touchdown to gate at MIA.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
This route has stayed remarkably steady year over year, a smaller swing than 92% of 5,368 comparable routes.
75.1% on time over the most recent 12 months (2025-08 to 2026-07), against 74.6% in the 12 months before (2024-08 to 2025-07), virtually unchanged.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 5,368 in the comparison.
What sets this route apart
Where BWI to MIA differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
BWI to MIA struggles most at 3 PM: 59.0% of its flights scheduled then arrive on time, 11.6 points behind the 70.6% on routes of similar length at the same hour. Against all other routes the gap is 13.7 points.
Saturday is the day BWI to MIA slips furthest against routes of similar length, 73.3% on time where they average 77.9%, 4.6 points lower. Against all other routes the gap is 5.8 points.
In August, BWI to MIA runs 10.6 points below routes of similar length, 64.3% on time to 74.9%. Against all other routes the gap is 12.2 points.
American Airlines does better on BWI to MIA than on its routes of similar length: 82.4% on time here, 74.0% there, 8.4 points apart. Against all other routes the gap is 7.3 points.
Frontier Airlines’ flights on BWI to MIA arrive on time 68.6% of the time, 4.7 points below the 73.3% it manages on its routes of similar length.
BWI to MIA against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 3 PM departures | 59.0% | routes of similar length | 70.6% | −11.6 pts | 229 here, 177,357 there |
| Weekday: Saturday | 73.3% | routes of similar length | 77.9% | −4.6 pts | 1,153 here, 394,995 there |
| Month: August | 64.3% | routes of similar length | 74.9% | −10.6 pts | 569 here, 237,239 there |
| Airline: American Airlines | 82.4% | routes of similar length | 74.0% | +8.4 pts | 1,589 here, 514,138 there |
| Airline: Frontier Airlines | 68.6% | routes of similar length | 73.3% | −4.7 pts | 859 here, 157,448 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 946 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
Why BWI → MIA flights are cancelled
July 2023 – July 2026
BWI → MIA cancelled 150 of 7,378 scheduled flights — about 1 in every 49. The reason filed most often was extreme weather, 61.3% of the cancellations coded on this route — about 1 in every 80 scheduled flights.
Share of cancellations
Of 150 cancelled departures carrying a reason code.
What each reason means
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
92 cancellations, 61.3% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
35 cancellations, 23.3% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
23 cancellations, 15.3% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
150 coded cancellations were recorded on BWI → MIA; the section appears from 50.
When it goes wrong
July 2023 – July 2026
53 min late
against a median of 4 min early
Percentiles over 7,378 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at MIA after arriving from BWI.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 42% | Likely to miss |
| 45 min | 25% | High risk |
| 60 min | 17% | High risk |
| 90 min | 8.9% | Some risk |
| 120 min | 5.7% | Some risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 2.03% of the time and diverts 0.26% of the time, which a late arrival never shows up in.
Chance of missing is the share of 7,209 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 53 minutes late (90th-percentile gate arrival delay), over 7,378 operations.
Any other layover length: connection checker.
Best time to fly
BWI → MIA flights departing 5–9 AM arrived on time 85.4% of the time, against 62.1% for 6–9 PM departures, a gap of 23.3 percentage points.
By departure window
By departure hour
- 12 AM to 5 AM: too few flights to score
- 6 AM: 88.8% on time from 1,418 flights
- 7 AM: 85.5% on time from 202 flights
- 8 AM: 80.2% on time from 998 flights
- 9 AM: 83.1% on time from 141 flights
- 10 AM: 80.8% on time from 254 flights
- 11 AM: 77.8% on time from 395 flights
- 12 PM: 82.2% on time from 184 flights
- 1 PM: 74.4% on time from 433 flights
- 2 PM: 68.8% on time from 360 flights
- 3 PM: 59.0% on time from 235 flights
- 4 PM: 62.0% on time from 130 flights
- 5 PM: 64.7% on time from 482 flights
- 6 PM: 63.7% on time from 511 flights
- 7 PM: 62.3% on time from 826 flights
- 8 PM: 60.5% on time from 654 flights
- 9 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why BWI → MIA runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for BWI → MIA. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on BWI → MIA, at 38.0%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 85.4% of the time and 6–9 PM departures 62.1%.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| Southwest Airlines | 3,876 | 72.4% | 1.47% | -2 min | 8.5% |
| American Airlines | 1,628 | 82.4% | 2.03% | -11 min | 6.2% |
| Frontier Airlines | 898 | 68.6% | 4.12% | -6 min | 14.1% |
| Spirit Airlines | 563 | 65.8% | 2.84% | -1 min | 16.3% |
| Envoy Air | 413 | 81.3% | 1.69% | -11 min | 6.2% |
Southwest Airlines flew 52.5% of the 7,378 flights listed. Frontier Airlines cancelled 4.12% of its flights here against 1.47% for Southwest Airlines.
American Airlines arrived on time 16.6 percentage points more often than Spirit Airlines on this route.
Other ways to fly Washington to Miami
Airport pairs in the same two city markets, as the DOT defines them.
BWI → FLL is the most reliable pairing for this journey at 75.0% on time, against 74.2% for BWI → MIA.
Flying to MIA from the Washington area? Compare BWI, DCA, IAD for MIA, with the same test for what counts as a real difference.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Sunday the least, a gap of 9.7 percentage points.
By month
- Jan: 72.6%
- Feb: 79.1%
- Mar: 76.0%
- Apr: 81.8%
- May: 74.4%
- Jun: 68.7%
- Jul: 60.7%
- Aug: 64.3%
- Sep: 79.7%
- Oct: 83.8%
- Nov: 80.7%
- Dec: 72.2%
July is historically the weakest month and October the strongest, a spread of 23.1 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 53.7% from 181 flights
- August 2023: 69.3% from 179 flights
- September 2023: 68.3% from 173 flights
- October 2023: 83.6% from 194 flights
- November 2023: 77.3% from 207 flights
- December 2023: 68.2% from 234 flights
- January 2024: 65.8% from 248 flights
- February 2024: 82.3% from 233 flights
- March 2024: 73.4% from 241 flights
- April 2024: 84.7% from 234 flights
- May 2024: 75.5% from 238 flights
- June 2024: 76.0% from 190 flights
- July 2024: 64.5% from 187 flights
- August 2024: 57.9% from 213 flights
- September 2024: 81.6% from 149 flights
- October 2024: 85.3% from 140 flights
- November 2024: 88.3% from 155 flights
- December 2024: 81.7% from 182 flights
- January 2025: 77.8% from 185 flights
- February 2025: 78.4% from 183 flights
- March 2025: 78.8% from 239 flights
- April 2025: 80.8% from 266 flights
- May 2025: 71.1% from 254 flights
- June 2025: 60.8% from 195 flights
- July 2025: 59.4% from 189 flights
- August 2025: 66.3% from 197 flights
- September 2025: 90.2% from 155 flights
- October 2025: 83.0% from 178 flights
- November 2025: 78.0% from 183 flights
- December 2025: 68.7% from 218 flights
- January 2026: 76.0% from 213 flights
- February 2026: 75.7% from 183 flights
- March 2026: 75.7% from 180 flights
- April 2026: 80.0% from 207 flights
- May 2026: 77.2% from 204 flights
- June 2026: 69.7% from 179 flights
- July 2026: 65.0% from 192 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 75.1% against 74.6% in the 12 months before — broadly unchanged.
Data and methodology
Calculated by FlyerIntel from 7,378 BWI → MIA flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed