Boston (BOS) to Fort Lauderdale (FLL): On-Time Performance
Data through July 2026
When you fly BOS to FLL matters as much as anything else about the booking: the route swung from 85% on-time in November 2024 to just 53% in December 2025. Across the full period the route averages 68% on-time against a national 78%. Morning departures also hold up better than evening ones (78% vs 57%), which matters most in the rough months.
- On-time
- 68%
- arrived <15 min late
- Avg delay
- 24 min
- completed flights
- Cancelled
- 2.3%
- Flights/day
- 9.2
- last 12 months
- Duration
- 3h 30m
- scheduled
- Distance
- 1,237 mi
Best airline from BOS to FLL
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 70% | 23 min | 2.1% | 1,772 |
| Spirit Airlines | 70% | 26 min | 2.9% | 1,466 |
| JetBlue Airways | 67% | 24 min | 2.2% | 3,828 |
Monthly on-time trend
Best time to fly from BOS to FLL
Aim for departures around 6 a.m. (84% on-time); avoid 9 p.m. departures (51%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 67% | 27 min |
| Tuesday | 75% | 16 min |
| Wednesdaybest | 75% | 16 min |
| Thursday | 67% | 24 min |
| Friday | 67% | 23 min |
| Saturday | 69% | 25 min |
| Sunday | 60% | 35 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft32%
- Airline operations31%
- National airspace system34%
- Weather3%
Frequently asked questions
- How often are flights from BOS to FLL delayed?
- 32% of BOS–FLL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 24 minutes.
- Which airline is most reliable from BOS to FLL?
- Delta Air Lines has the best on-time record on this route at 70%, based on 1,772 flights. 3 airlines flew BOS–FLL frequently enough to compare in this period.
- What is the best time of day to fly from BOS to FLL?
- Departures around 6 a.m. have the best record (84% on-time), while departures around 9 p.m. have the worst (51%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BOS to FLL?
- The scheduled BOS–FLL flight time averages 3h 30m over 1,237 miles. Actual arrival times vary — flights on this route land 15+ minutes late 32% of the time.
- How often are BOS to FLL flights cancelled?
- 2.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from BOS to FLL?
- December 2025 was the roughest month in this dataset, with only 53% of arrivals on time. The best was November 2024 at 85%. If your dates are flexible, that 32-point gap is worth planning around.
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Based on 7,066 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.