Historical on-time performance
Washington to Miami
Flights on IAD–MIA arrive on time 84% of the time over the last 12 months.
based on 512 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time84%Medianon timep9025 minCancel0.6%Flights512
Why flights run late
Delay causes
- Airline22%
- Weather1%
- Air traffic (NAS)46%
- Late aircraft31%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline67%
- Weather33%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 3 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 → MIA
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 67% to 86% on time.
- Mornings86% on time · p90 20 min · 1,077 flights
- Middays83% on time · p90 40 min · 150 flights · limited
- Evenings67% on time · p90 75 min · 359 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 25 min · 214 flights
- Wednesdays83% on time · p90 25 min · 215 flights
- Fridays81% on time · p90 35 min · 260 flights
- Saturdays80% on time · p90 40 min · 252 flights
- Mondays79% on time · p90 35 min · 262 flights
- Thursdays79% on time · p90 40 min · 253 flights
- Sundays75% on time · p90 50 min · 256 flights
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