Historical on-time performance
Seattle to Fort Lauderdale
2,717 miData through Dec 2025Source: US DOT · BTS
Flights on SEA–FLL arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 810 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Delta Air LinesOn-time76%Medianon timep9030 minCancel1.0%Flights307
- Alaska AirlinesOn-time81%Medianon timep9020 minCancel0.4%Flights503
Why flights run late
Delay causes
- Airline51%
- Weather1%
- Air traffic (NAS)34%
- Late aircraft14%
- Security0%
Most delay minutes here are attributed to Airline.
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 (2023-01 .. 2025-12).
Best time of day
Overnights are the most reliable time of day to fly this route — 82% on time.
- Overnights82% on time · p90 20 min · 538 flights
- Mornings78% on time · p90 30 min · 1,912 flights
- Middays77% on time · p90 25 min · 249 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 84% on time.
- Tuesdays84% on time · p90 20 min · 382 flights
- Thursdays80% on time · p90 25 min · 387 flights
- Saturdays80% on time · p90 25 min · 389 flights
- Wednesdays79% on time · p90 25 min · 382 flights
- Fridays78% on time · p90 25 min · 394 flights
- Mondays78% on time · p90 30 min · 395 flights
- Sundays73% on time · p90 45 min · 398 flights
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