Historical on-time performance
Washington to Fort Lauderdale
901 miData through Dec 2025Source: US DOT · BTS
Flights on IAD–FLL arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights
based on 770 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time81%Medianon timep9040 minCancel0.3%Flights770
Why flights run late
Delay causes
- Airline22%
- Weather9%
- Air traffic (NAS)36%
- Late aircraft34%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly IAD → FLL
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 86% on time.
- Mornings86% on time · p90 20 min · 947 flights
- Middays76% on time · p90 45 min · 344 flights
- Evenings76% on time · p90 50 min · 1,041 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 83% on time.
- Mondays83% on time · p90 25 min · 342 flights
- Thursdays83% on time · p90 25 min · 338 flights
- Tuesdays83% on time · p90 30 min · 322 flights
- Saturdays79% on time · p90 45 min · 334 flights
- Fridays78% on time · p90 40 min · 338 flights
- Wednesdays78% on time · p90 30 min · 320 flights
- Sundays75% on time · p90 75 min · 341 flights
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