Historical on-time performance
Chicago to San Antonio
Flights on ORD–SAT arrive on time 72% of the time over the last 12 months.
based on 1,684 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- United AirlinesOn-time75%Medianon timep9055 minCancel1.0%Flights811
- Envoy AirOn-time74%Medianon timep9050 minCancel2.5%Flights322
- American AirlinesOn-time68%Medianon timep9075 minCancel2.4%Flights551
Why flights run late
Delay causes
- Airline24%
- Weather5%
- Air traffic (NAS)16%
- Late aircraft54%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline7%
- Weather79%
- Air traffic (NAS)14%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 29 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 ORD → SAT
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 82% on time.
- Mornings82% on time · p90 30 min · 1,651 flights
- Middays78% on time · p90 45 min · 884 flights
- Evenings70% on time · p90 60 min · 765 flights
- Afternoons69% on time · p90 60 min · 311 flights
- Overnights64% on time · p90 75 min · 1,290 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 77% on time.
- Tuesdays77% on time · p90 60 min · 641 flights
- Thursdays76% on time · p90 50 min · 747 flights
- Wednesdays75% on time · p90 55 min · 667 flights
- Mondays74% on time · p90 50 min · 748 flights
- Saturdays73% on time · p90 65 min · 603 flights
- Fridays71% on time · p90 60 min · 750 flights
- Sundays71% on time · p90 50 min · 747 flights
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