Historical on-time performance
St. Thomas to Chicago
Flights on STT–ORD arrive on time 64% of the time over the last 12 months.
based on 61 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.
- American AirlinesOn-time77%Medianon timep9035 minCancel0.0%Flights31
- United AirlinesOn-time50%Median5 minp9045 minCancel0.0%Flights30
Why flights run late
Delay causes
- Airline12%
- Weather5%
- Air traffic (NAS)44%
- Late aircraft39%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline100%
- Weather0%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 1 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
The seasonal pattern appears once multiple months of the year are loaded.
When to fly
Best time to fly STT → ORD
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best day of week
On-time rates are fairly even by day on this route — ranging from 66% to 69% on time.
- Sundays69% on time · p90 50 min · 108 flights · limited
- Saturdays66% on time · p90 60 min · 186 flights · limited
Keep exploring