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

Seattle, WA (SEA) to Fort Lauderdale, FL (FLL) flight delay odds

Historically, 76.8% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 826 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
76.8%arrived on time
11.1%30+ min late
1.0%cancelled
826scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.8%all scheduled flights
120+ minutes late1.7%all scheduled flights
Diverted0.7%did not reach as scheduled
Average arrival+2.6 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 morning46082.0%8.0%0.9%
Late morning19063.2%14.7%2.1%
Afternoon7984.8%10.1%0.0%
Night9671.9%19.8%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
Monday12175.2%9.9%0.8%
Tuesday11581.7%8.7%0.0%
Wednesday11489.5%4.4%1.8%
Thursday11876.3%11.9%0.8%
Friday12171.1%14.0%0.8%
Saturday11676.7%10.3%0.9%
Sunday12167.8%18.2%1.7%

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
Alaska Airlines46280.5%9.7%0.4%
Delta Air Lines36472.0%12.9%1.6%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 20256266.1%12.9%4.8%
August 20256280.6%12.9%0.0%
September 20256090.0%1.7%0.0%
October 20256290.3%3.2%0.0%
November 20256671.2%10.6%0.0%
December 20259363.4%19.4%1.1%
January 20266770.1%10.4%3.0%
February 20266971.0%17.4%0.0%
March 20268672.1%15.1%1.2%
April 20267777.9%11.7%1.3%
May 20266288.7%4.8%0.0%
June 20266090.0%6.7%0.0%

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.

Airline46.5%
Late aircraft18.4%
National airspace34.8%
Weather0.3%
Security0.0%
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.