Historical on-time performance
Seattle to Fort Lauderdale
2,717 miData through May 2026Source: US DOT · BTS
Flights on SEA–FLL arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights
based on 769 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Alaska AirlinesbestOn-time79%Medianon timep9030 minCancel0.4%Flights462
- Delta Air LinesOn-time73%Medianon timep9030 minCancel2.0%Flights307
Why flights run late
Delay causes
- Airline45%
- Weather0%
- Air traffic (NAS)36%
- Late aircraft19%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline75%
- Weather25%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 8 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 SEA → FLL
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Overnights are the most reliable time of day to fly this route — 84% on time.
- Overnights84% on time · p90 20 min · 462 flights
- Mornings80% on time · p90 30 min · 1,761 flights
- Middays73% on time · p90 30 min · 400 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 84% on time.
- Tuesdays84% on time · p90 20 min · 364 flights
- Wednesdays82% on time · p90 20 min · 366 flights
- Thursdays80% on time · p90 25 min · 381 flights
- Saturdays80% on time · p90 25 min · 378 flights
- Mondays79% on time · p90 25 min · 385 flights
- Fridays78% on time · p90 30 min · 388 flights
- Sundays75% on time · p90 45 min · 389 flights
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