Best Time to Fly BOS to FLL: On-Time Stats by Hour & Airline
Logan International → Fort Lauderdale-Hollywood International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 67.0% of Boston (BOS) to Fort Lauderdale (FLL) flights arrived on time (3,359 scheduled flights). That is 10.6 points below the national average of 77.6%.
Among 3 airlines, Delta Air Lines led with 69.8% on time and Spirit Airlines was last with 63.8%.
Over 24 months, Wednesday was the most reliable day (76% on time) and December the worst month (58%).
The cancellation rate was 3.6% (US average 1.8%).
BOS to FLL 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 |
|---|---|---|---|---|
| Delta Air Lines | 69.8% | 78 min | 3.0% | 886 |
| JetBlue | 66.5% | 67 min | 3.3% | 1,963 |
| Spirit Airlines | 63.8% | 81 min | 5.7% | 510 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BOS to FLL
On-time arrival % by scheduled departure hour (local time), 6,849 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 80.4% | 5.1% | 354 |
| 6am–7am | 84.7% | 2.2% | 920 |
| 7am–8am | 77.7% | 2.5% | 888 |
| 8am–9am | 80.7% | 3.3% | 212 |
| 9am–10am | 68.5% | 5.1% | 117 |
| 10am–11am | 69.7% | 2.9% | 313 |
| 11am–12pm | 70.0% | 0.2% | 441 |
| 12pm–1pm | 68.8% | 1.4% | 290 |
| 1pm–2pm | 62.3% | 3.6% | 110 |
| 2pm–3pm | 69.2% | 1.6% | 187 |
| 3pm–4pm | 62.5% | 1.2% | 831 |
| 4pm–5pm | 56.1% | 1.5% | 472 |
| 5pm–6pm | 54.1% | 2.7% | 328 |
| 6pm–7pm | 58.4% | 2.7% | 367 |
| 7pm–8pm | 63.5% | 3.1% | 508 |
| 8pm–9pm | 54.5% | 2.7% | 438 |
| 9pm–10pm | 47.9% | 0.0% | 71 |
| 10pm–11pm | Limited data | 2 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BOS to FLL
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) | 68.1% | -2.2 pts | 2.7% | 146 |
| Christmas & New Year (Dec 20 - Jan 3) | 47.8% | -22.4 pts | 2.7% | 404 |
| Summer peak (Jun 15 - Aug 15) | 68.0% | -2.2 pts | 3.6% | 884 |
| All other days | 70.3% | — | 2.0% | 5,415 |
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).