Route profile
MIA→BWI
Flight reliability, delays and best times to fly from Miami to Baltimore, 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 27% of comparable major US routes (4,598 compared)
Calculated from 7,376 flights. How this is calculated
MIA → BWI arrives on time 75.2% of the time; the return trip, BWI → MIA, arrives on time 74.2% of the time.
MIA → BWI spends 26.6 minutes on the ground on a 946-mile trip: 19.8 minutes from pushback to wheels-up at MIA and 6.8 minutes from touchdown to gate at BWI.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
On-time performance swings unusually widely by time of day here, wider than 94% of 4,023 comparable routes.
92.4% on time for 5–9 AM departures, against 59.8% for 6–9 PM.
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 4,023 in the comparison.
What sets this route apart
Where MIA to BWI differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
MIA to BWI struggles most at 6 PM: 50.6% of its flights scheduled then arrive on time, 17.4 points behind the 68.0% on routes of similar length at the same hour. Against all other routes the gap is 18 points.
MIA to BWI is at its best against routes of similar length for flights scheduled at 7 AM: 93.7% arrive on time, 5.2 points ahead of the 88.5% those routes manage at that hour. Against all other routes the gap is 5.9 points.
Sunday is the day MIA to BWI slips furthest against routes of similar length, 69.4% on time where they average 74.0%, 4.6 points lower. Against all other routes the gap is 5.4 points.
In July, MIA to BWI runs 7.2 points below routes of similar length, 61.3% on time to 68.5%. Against all other routes the gap is 8.4 points.
American Airlines’ flights on MIA to BWI arrive on time 68.2% of the time, 5.9 points below the 74.1% it manages on its routes of similar length. Against all other routes the gap is 6.9 points.
MIA to BWI against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 6 PM departures | 50.6% | routes of similar length | 68.0% | −17.4 pts | 405 here, 188,925 there |
| Hour: 7 AM departures | 93.7% | routes of similar length | 88.5% | +5.2 pts | 586 here, 236,678 there |
| Weekday: Sunday | 69.4% | routes of similar length | 74.0% | −4.6 pts | 1,061 here, 438,161 there |
| Month: July | 61.3% | routes of similar length | 68.5% | −7.2 pts | 713 here, 324,587 there |
| Airline: American Airlines | 68.2% | routes of similar length | 74.1% | −5.9 pts | 1,587 here, 514,140 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 MIA → BWI flights are cancelled
July 2023 – July 2026
MIA → BWI cancelled 137 of 7,376 scheduled flights — about 1 in every 54. The reason filed most often was extreme weather, 61.3% of the cancellations coded on this route — about 1 in every 88 scheduled flights.
Share of cancellations
Of 137 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.
84 cancellations, 61.3% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
31 cancellations, 22.6% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
22 cancellations, 16.1% 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.
137 coded cancellations were recorded on MIA → BWI; the section appears from 50.
When it goes wrong
July 2023 – July 2026
51 min late
against a median of 4 min early
Percentiles over 7,376 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at BWI after arriving from MIA.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 41% | Likely to miss |
| 45 min | 24% | High risk |
| 60 min | 16% | High risk |
| 90 min | 8.5% | Some risk |
| 120 min | 5.2% | 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 1.86% of the time and diverts 0.35% of the time, which a late arrival never shows up in.
Chance of missing is the share of 7,213 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 51 minutes late (90th-percentile gate arrival delay), over 7,376 operations.
Any other layover length: connection checker.
Best time to fly
MIA → BWI flights departing 5–9 AM arrived on time 92.4% of the time, against 59.8% for 6–9 PM departures, a gap of 32.6 percentage points.
By departure window
By departure hour
- 12 AM to 4 AM: too few flights to score
- 5 AM: 90.5% on time from 276 flights
- 6 AM: 92.4% on time from 898 flights
- 7 AM: 93.7% on time from 592 flights
- 8 AM: too few flights to score
- 9 AM: 86.7% on time from 208 flights
- 10 AM: 85.5% on time from 131 flights
- 11 AM: 76.6% on time from 218 flights
- 12 PM: 74.8% on time from 514 flights
- 1 PM: 72.1% on time from 257 flights
- 2 PM: 77.8% on time from 266 flights
- 3 PM: 67.6% on time from 943 flights
- 4 PM: 67.1% on time from 235 flights
- 5 PM: 69.9% on time from 409 flights
- 6 PM: 50.6% on time from 415 flights
- 7 PM: 68.2% on time from 436 flights
- 8 PM: 60.4% on time from 187 flights
- 9 PM: 68.2% on time from 1,276 flights
- 10 PM to 11 PM: too few flights to score
Why MIA → BWI 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 MIA → BWI. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on MIA → BWI, at 46.3%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 92.4% of the time and 6–9 PM departures 59.8%.
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 | 3,873 | 76.6% | 1.52% | -3 min | 7.6% |
| American Airlines | 1,627 | 68.2% | 1.97% | -2 min | 10.9% |
| Frontier Airlines | 899 | 76.8% | 2.78% | -8 min | 9.8% |
| Spirit Airlines | 562 | 80.0% | 2.67% | -9 min | 9.3% |
| Envoy Air | 415 | 79.7% | 1.45% | -5 min | 5.6% |
Southwest Airlines flew 52.5% of the 7,376 flights listed. Frontier Airlines cancelled 2.78% of its flights here against 1.45% for Envoy Air.
Spirit Airlines arrived on time 11.8 percentage points more often than American Airlines on this route.
Other ways to fly Miami to Washington
Airport pairs in the same two city markets, as the DOT defines them.
Flying to BWI from the Miami area? Compare MIA, FLL for BWI, with the same test for what counts as a real difference.
Weekly and seasonal patterns
By day of week
Wednesday is historically the most reliable day and Sunday the least, a gap of 12.4 percentage points.
By month
- Jan: 78.9%
- Feb: 79.1%
- Mar: 72.8%
- Apr: 77.0%
- May: 74.9%
- Jun: 73.1%
- Jul: 61.3%
- Aug: 69.2%
- Sep: 78.7%
- Oct: 82.8%
- Nov: 82.5%
- Dec: 76.9%
July is historically the weakest month and October the strongest, a spread of 21.5 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 64.9% from 181 flights
- August 2023: 74.9% from 177 flights
- September 2023: 72.6% from 171 flights
- October 2023: 79.1% from 196 flights
- November 2023: 79.6% from 206 flights
- December 2023: 78.5% from 235 flights
- January 2024: 71.7% from 248 flights
- February 2024: 82.4% from 233 flights
- March 2024: 74.7% from 241 flights
- April 2024: 82.0% from 235 flights
- May 2024: 78.7% from 239 flights
- June 2024: 76.5% from 189 flights
- July 2024: 66.7% from 189 flights
- August 2024: 68.5% from 213 flights
- September 2024: 81.8% from 148 flights
- October 2024: 89.1% from 140 flights
- November 2024: 87.7% from 155 flights
- December 2024: 80.0% from 181 flights
- January 2025: 83.1% from 184 flights
- February 2025: 81.5% from 183 flights
- March 2025: 76.1% from 239 flights
- April 2025: 76.2% from 266 flights
- May 2025: 70.8% from 255 flights
- June 2025: 72.7% from 196 flights
- July 2025: 61.5% from 190 flights
- August 2025: 64.9% from 197 flights
- September 2025: 82.5% from 155 flights
- October 2025: 81.8% from 177 flights
- November 2025: 81.5% from 183 flights
- December 2025: 72.7% from 218 flights
- January 2026: 83.8% from 211 flights
- February 2026: 72.5% from 182 flights
- March 2026: 65.7% from 181 flights
- April 2026: 72.3% from 207 flights
- May 2026: 75.5% from 204 flights
- June 2026: 69.9% from 179 flights
- July 2026: 51.7% from 192 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 72.8% against 76.5% in the 12 months before — declining by 3.7 percentage points.
Data and methodology
Calculated by FlyerIntel from 7,376 MIA → BWI 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