Historical on-time performance
Fort Lauderdale to Boston
1,237 miData through May 2026Source: US DOT · BTS
Flights on FLL–BOS arrive on time 64% of the time over the last 12 months.
On-time rate64%arrived within 15 min
p90 delay85 min1 in 10 flights is worse (tail risk)
Cancelled3.2%of scheduled flights
based on 3,432 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time69%Medianon timep9070 minCancel3.1%Flights882
- JetBlue AirwaysOn-time64%Medianon timep9085 minCancel2.9%Flights1,949
- Spirit AirlinesOn-time59%Medianon timep90100 minCancel4.5%Flights601
Why flights run late
Delay causes
- Airline29%
- Weather3%
- Air traffic (NAS)31%
- Late aircraft36%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline27%
- Weather50%
- Air traffic (NAS)23%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 111 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly FLL → BOS
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 85% on time.
- Mornings85% on time · p90 20 min · 2,443 flights
- Middays69% on time · p90 65 min · 2,451 flights
- Overnights58% on time · p90 90 min · 2,314 flights
- Afternoons57% on time · p90 100 min · 1,121 flights
- Evenings55% on time · p90 100 min · 1,490 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 62% to 72% on time.
- Tuesdays72% on time · p90 60 min · 1,310 flights
- Wednesdays72% on time · p90 55 min · 1,327 flights
- Saturdays70% on time · p90 70 min · 1,370 flights
- Thursdays67% on time · p90 80 min · 1,438 flights
- Fridays65% on time · p90 75 min · 1,462 flights
- Mondays64% on time · p90 75 min · 1,458 flights
- Sundays62% on time · p90 90 min · 1,454 flights
Keep exploring