Fort Lauderdale (FLL) to Boston (BOS): On-Time Performance
Data through May 2026
Fort Lauderdale (FLL) to Boston (BOS) effectively runs on two schedules. In November 2024, 86% of arrivals were on time; in July 2025 that fell to 54% — a 31-point seasonal swing. Across the full period the route averages 70% on-time against a national 78%. Morning departures also hold up better than evening ones (82% vs 62%), which matters most in the rough months.
- On-time
- 70%
- arrived <15 min late
- Avg delay
- 23 min
- completed flights
- Cancelled
- 2.1%
- Flights/day
- 9.5
- last 12 months
- Duration
- 3h 16m
- scheduled
- Distance
- 1,237 mi
Best airline from FLL to BOS
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 73% | 22 min | 2.1% | 1,706 |
| Spirit Airlines | 70% | 21 min | 2.8% | 1,524 |
| JetBlue Airways | 69% | 24 min | 1.9% | 3,654 |
Monthly on-time trend
Best time to fly from FLL to BOS
Aim for departures around 6 a.m. (91% on-time); avoid 5 p.m. departures (54%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 67% | 26 min |
| Tuesday | 74% | 19 min |
| Wednesdaybest | 77% | 16 min |
| Thursday | 69% | 24 min |
| Friday | 67% | 26 min |
| Saturday | 74% | 21 min |
| Sunday | 66% | 28 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft36%
- Airline operations30%
- National airspace system31%
- Weather3%
Frequently asked questions
- How often are flights from FLL to BOS delayed?
- 30% of FLL–BOS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 23 minutes.
- Which airline is most reliable from FLL to BOS?
- Delta Air Lines has the best on-time record on this route at 73%, based on 1,706 flights. 3 airlines flew FLL–BOS frequently enough to compare in this period.
- What is the best time of day to fly from FLL to BOS?
- Departures around 6 a.m. have the best record (91% on-time), while departures around 5 p.m. have the worst (54%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from FLL to BOS?
- The scheduled FLL–BOS flight time averages 3h 16m over 1,237 miles. Actual arrival times vary — flights on this route land 15+ minutes late 30% of the time.
- How often are FLL to BOS flights cancelled?
- 2.1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from FLL to BOS?
- July 2025 was the roughest month in this dataset, with only 54% of arrivals on time. The best was November 2024 at 86%. If your dates are flexible, that 31-point gap is worth planning around.
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Based on 6,884 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.