Historical on-time performance
St. Thomas to Washington
Flights on STT–IAD arrive on time 82% of the time over the last 12 months.
based on 266 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time82%Medianon timep9035 minCancel1.5%Flights266
Why flights run late
Delay causes
- Airline27%
- Weather0%
- Air traffic (NAS)17%
- Late aircraft56%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather25%
- Air traffic (NAS)75%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). 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 STT → IAD
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 78% to 83% on time.
- Middays83% on time · p90 25 min · 481 flights
- Afternoons78% on time · p90 40 min · 446 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 78% to 85% on time.
- Mondays85% on time · p90 30 min · 129 flights · limited
- Sundays83% on time · p90 25 min · 135 flights · limited
- Tuesdays81% on time · p90 30 min · 127 flights · limited
- Saturdays81% on time · p90 30 min · 172 flights · limited
- Wednesdays80% on time · p90 50 min · 127 flights · limited
- Fridays78% on time · p90 45 min · 129 flights · limited
- Thursdays78% on time · p90 55 min · 128 flights · limited
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