Flight Reliability
B6 1220 · JetBlue Airways
Miami → Boston (MIA–BOS)
69
Usually Fine
WanderNerd Reliability Score
- 70%
- Arrive within 15 minutes
- 9 min
- Average arrival delay
- 2.1%
- Cancelled
- 11 min early
- Median arrival delay
Based on 94 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
B6 1220 departing between 9 AM–12 PM arrived on time 79% of the time, versus 42% between 12–3 PM.
Friday is doing you no favors.
B6 1220 arrived on time 85% of the time on Mondays and just 50% on Fridays. That gap is worth planning around.
A bit behind the JetBlue Airways network.
B6 1220 arrived on time 70% of the time, versus 73% across the JetBlue Airways network.
The breakdown
- Mon85%(13 flights)
- Tue71%(14 flights)
- Wed69%(13 flights)
- Thu62%(13 flights)
- Fri50%(12 flights)
- Sat77%(13 flights)
- Sun71%(14 flights)
- 9 AM–12 PM79%(68 flights)
- 12–3 PM42%(24 flights)
81%
Aug
Jun 57% → Aug 81% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 57% | 30 |
| July 2025 | 72% | 29 |
| August 2025 | 81% | 31 |
- Departures on time
- 67%
- Diverted
- 0%
- Flights flown
- 92
- Months covered
- 4
Same route, other flights
Keep nerding
Based on 94 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.