Historical on-time performance
Washington to West Palm Beach
859 miData through May 2026Source: US DOT · BTS
Flights on IAD–PBI arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.4%of scheduled flights
based on 277 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time79%Medianon timep9040 minCancel1.4%Flights277
Why flights run late
Delay causes
- Airline21%
- Weather5%
- Air traffic (NAS)31%
- Late aircraft43%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline25%
- Weather75%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 4 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 IAD → PBI
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 79% to 81% on time.
- Evenings81% on time · p90 45 min · 135 flights · limited
- Mornings79% on time · p90 30 min · 229 flights
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