BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
BOSFLL

Boston, MA (BOS) to Fort Lauderdale, FL (FLL) flight delay odds

Historically, 64.1% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 3,417 flights.

HISTORICAL ROUTE SIGNALVariable
64.1%arrived on time
22.6%30+ min late
3.5%cancelled
3,417scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late13.2%all scheduled flights
120+ minutes late5.0%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival+16.8 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Early morning1,25477.0%11.0%3.7%
Late morning36865.5%19.6%3.3%
Afternoon84859.6%27.2%2.9%
Evening88851.1%34.1%3.8%
Night5945.8%45.8%0.0%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday50361.6%22.5%7.0%
Tuesday47068.9%18.9%4.5%
Wednesday45874.9%14.0%2.0%
Thursday49065.3%22.7%1.0%
Friday50762.5%25.2%2.0%
Saturday48362.5%25.5%2.5%
Sunday50654.5%28.3%5.1%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
JetBlue Airways1,96163.7%23.3%3.2%
Delta Air Lines88567.0%20.1%3.1%
Spirit Airlines57161.3%24.0%5.1%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 202524761.9%27.5%4.5%
August 202524074.6%17.9%0.0%
September 202523263.4%24.6%2.2%
October 202525076.0%16.4%1.2%
November 202529467.7%18.7%5.4%
December 202536651.9%33.3%2.2%
January 202630353.8%27.1%5.3%
February 202634352.8%27.1%10.8%
March 202639064.4%20.0%4.6%
April 202636768.1%22.3%0.3%
May 202620674.8%11.7%0.0%
June 202617975.4%14.5%1.7%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline28.4%
Late aircraft36.5%
National airspace32.7%
Weather2.4%
Security0.1%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.