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

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

76.8% of 826 official scheduled SEA-to-FLL flights arrived on time; 11.1% arrived at least 30 minutes late and 1.0% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

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

Which departure time was most reliable for SEA to FLL?

Among qualifying SEA-to-FLL departure window results, Afternoon had the highest on-time rate: 84.8% of 79 flights. Late morning was lowest at 63.2% across 190 flights.

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%

Which weekday was most reliable for SEA to FLL?

Among qualifying SEA-to-FLL weekday results, Wednesday had the highest on-time rate: 89.5% of 114 flights. Sunday was lowest at 67.8% across 121 flights.

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%

Which airline was most reliable for SEA to FLL?

Among qualifying SEA-to-FLL airline results, Alaska Airlines had the highest on-time rate: 80.5% of 462 flights. Delta Air Lines was lowest at 72.0% across 364 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines46280.5%9.7%0.4%
Delta Air Lines36472.0%12.9%1.6%

Which month was most reliable for SEA to FLL?

Among qualifying SEA-to-FLL month results, October 2025 had the highest on-time rate: 90.3% of 62 flights. December 2025 was lowest at 63.4% across 93 flights.

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 SEA to FLL delay minutes?

Airline was the largest recorded SEA-to-FLL delay category, accounting for 46.5% of 8,822 BTS-attributed delay minutes during July 2025–June 2026.

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.