BWI to MIA flight delays
Baltimore, MD (BWI) Miami, FL (MIA) · 946 miles
2,286 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
74.72%
Arrived on time
Within 15 minutes of schedule
2.1%
Cancelled
Share of scheduled flights
73 min
When late, late by
Average across delayed arrivals
20 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. Envoy Air arrived on time 12.2 points more often than Frontier Airlines over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
The season swings this route hard. In September it ran 30.8 points more punctual than in July — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
Flights from Baltimore to Miami run late more often than the average route, though not severely.
Which airline should you fly on this route?
Over January 2025 – August 2026, Envoy Air arrived on time most often on BWI to MIA. Frontier Airlines was late most often. Flights ran closest to schedule in September and worst in July.
Every airline on BWI to MIA
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 1,181 | 72.34% | 1.86% | 59 min | D |
| American Airlines | 689 | 80.42% | 2.32% | 101 min | C |
| Frontier Airlines | 265 | 69.41% | 3.4% | 89 min | F |
| Envoy Air | 114 | 81.58% | 0% | 62 min | B |
| Spirit Airlines | 37 | 61.11% | 2.7% | 64 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
MIA to BWI Miami back to Baltimore 73.64% on time DOther routes from Baltimore
Common questions
Are flights from Baltimore to Miami usually delayed?
74.72% of flights on the BWI to MIA route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is about the same as the average route in this record.
Which airline is most on time from Baltimore to Miami?
Envoy Air, at 81.58% on time across 114 flights. The least punctual on the route was Frontier Airlines at 69.41%.
How often are BWI to MIA flights cancelled?
2.1% of scheduled flights did not operate — about 21 in every thousand. That is in the normal range.
What is the best month to fly Baltimore to Miami?
September, when 90.2% of flights arrived on time. The worst was July at 59.4%.
When BWI to MIA flights are late, how late are they?
About 73 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on BWI to MIA during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →