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Tell FlyerIntel where and when you are flying. It will show how that route actually performs at that time of day and on that day of the week, what both airports are doing right now, and when to get to the airport.
BOS → MIA
Boston to Miami · departing 8:00 AM
BOS → MIA flights departing 5–9 AM arrive on time 88.4% of the time, against 78.2% across the whole day — your departure window is 10.2 points better than average for this route.
There is no day-by-hour view for BOS → MIA: only 34 of its weekday-and-hour slots have 120 or more flights, and a day-by-hour view needs 45.
Other times on BOS → MIA
Time of day
5–9 AM is among the most reliable times to leave on BOS → MIA: 88.4% on time.
- 5–9 AM88.4%
- 9 AM–12 PM76.8%
- 12–3 PM75.5%
- 3–6 PM64.0%
- 6–9 PM65.3%
- 9 PM–5 AMToo few flights to score
Day of week
- Monday78.6%
- Tuesday82.0%
- Wednesday80.9%
- Thursday77.8%
- Friday77.6%
- Saturday77.0%
- Sunday74.0%
Bars start below the lowest figure so a real gap is visible; read the percentage, not the bar length. A time with too few flights to score is left unscored rather than guessed at.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · History describes what has happened on this route. It is not a prediction about your flight. Full route profile →
Which flight
Flights on BOS → MIA, the ones scheduled closest to 8:00 AM first.
Within 90 minutes of 8:00 AM, AA1259 (usually 8:00 AM) has the best record: 88.7% on time and 1.25% cancelled over 1,042 flights, against 78.2% on time for BOS → MIA as a whole.
| Flight | Usually departs | On time | Cancelled |
|---|---|---|---|
| AA1259American AirlinesLive map | 8:00 AM | 88.7% | 1.25% |
| DL1399Delta Air LinesLive map | 7:05 AM55 min away | 84.4% | 1.16% |
| AA873American AirlinesLive map | 9:00 AM60 min away | 87.4% | 0.96% |
| AA1418American AirlinesLive map | 5:15 AM165 min away | 93.3% | 1.59% |
| DL776Delta Air LinesLive map | 3:20 PM440 min away | 64.5% | 1.66% |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · “Usually departs” is the scheduled time each flight number most often had over the period; airlines retime flights, so confirm the time on your booking. Flight numbers with fewer than 90 operations on this route are left out. This is history, not a forecast for your flight.
When to get to the airport
A starting point for BOS, not a promise about your day.
2h 20m before your 8:00 AM departure
How this was worked out
- FlyerIntel cannot currently obtain live security wait times for BOS, so this figure does not account for the queue on the day.
- It does not include your journey to the airport, parking, or a shuttle from a remote lot.
- International departures, and travel with children, checked pets or special assistance, need more time.
Both airports right now
Aviation weather is not currently a factor.
Minimal operational impact. Conditions are not a notable factor for operations right now.
UpdatedAviation weather is not currently a factor.
Low operational impact. Conditions are slightly below ideal but rarely disruptive on their own.
- Cloud ceiling 2000 feet.
Source: NOAA Aviation Weather Center · Conditions describe the airfield, not your flight, and change quickly.
Other ways to make this journey
Airport pairings serving Boston to Miami.
Who flies this route
Performance by the carrier that actually operates the flight.
| Carrier | Flights | On time | Cancelled | Median delay |
|---|---|---|---|---|
| American Airlines | 6,971 | 82.8% | 1.48% | -12 min |
| Delta Air Lines | 2,369 | 73.4% | 1.60% | -6 min |
| JetBlue | 1,143 | 69.1% | 2.01% | -3 min |
| Spirit Airlines | 820 | 68.3% | 2.07% | -4 min |