Best Time to Fly BWI to MIA: On-Time Stats by Hour & Airline
Baltimore/Washington International Thurgood Marshall → Miami International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.2% of Baltimore (BWI) to Miami (MIA) flights arrived on time (2,289 scheduled flights). That is 2.5 points below the national average of 77.6%.
Envoy Air was the most punctual of the 4 airlines on the route at 81.6%, while Frontier Airlines trailed at 69.2%.
September has been the best month (86% on time) and Sunday the weakest day of the week (69%).
2.2% of flights were cancelled, versus 1.8% nationally.
BWI to MIA on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Air | 81.6% | 62 min | 0.0% | 114 |
| American Airlines | 81.3% | 116 min | 2.1% | 699 |
| Southwest Airlines | 72.7% | 54 min | 1.9% | 1,183 |
| Frontier Airlines | 69.2% | 95 min | 4.2% | 265 |
| Spirit Airlines | Limited data | 28 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BWI to MIA
On-time arrival % by scheduled departure hour (local time), 4,639 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 21 | |
| 6am–7am | 88.7% | 1.9% | 805 |
| 7am–8am | 88.1% | 1.6% | 61 |
| 8am–9am | 80.8% | 1.6% | 851 |
| 9am–10am | 89.1% | 5.1% | 59 |
| 10am–11am | 85.5% | 2.6% | 113 |
| 11am–12pm | 76.3% | 1.7% | 349 |
| 12pm–1pm | 86.5% | 2.2% | 92 |
| 1pm–2pm | 77.7% | 1.6% | 312 |
| 2pm–3pm | 73.1% | 1.5% | 198 |
| 3pm–4pm | 57.3% | 3.9% | 129 |
| 4pm–5pm | 61.7% | 1.6% | 61 |
| 5pm–6pm | 68.0% | 1.7% | 181 |
| 6pm–7pm | 64.1% | 2.1% | 375 |
| 7pm–8pm | 61.2% | 2.4% | 614 |
| 8pm–9pm | 61.8% | 4.9% | 385 |
| 9pm–10pm | 84.8% | 0.0% | 33 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BWI to MIA
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 79.1% | +1.2 pts | 0.0% | 91 |
| Christmas & New Year (Dec 20 - Jan 3) | 73.2% | -4.7 pts | 2.5% | 199 |
| Summer peak (Jun 15 - Aug 15) | 60.6% | -17.3 pts | 4.1% | 773 |
| All other days | 77.9% | — | 1.9% | 3,576 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).