Historical on-time performance
Chicago to Austin
978 miData through Dec 2025Source: US DOT · BTS
Flights on ORD–AUS arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights
based on 2,827 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-time78%Medianon timep9040 minCancel0.5%Flights1,306
- Envoy AirOn-time79%Medianon timep9025 minCancel1.1%Flights92
- American AirlinesOn-time66%Medianon timep9080 minCancel2.4%Flights1,153
- Southwest AirlinesOn-time69%Medianon timep9055 minCancel0.4%Flights276
Why flights run late
Delay causes
- Airline26%
- Weather5%
- Air traffic (NAS)18%
- Late aircraft51%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ORD → AUS
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 83% on time.
- Mornings83% on time · p90 25 min · 2,730 flights
- Middays78% on time · p90 40 min · 2,425 flights
- Afternoons69% on time · p90 55 min · 1,194 flights
- Evenings66% on time · p90 70 min · 1,873 flights
- Overnights64% on time · p90 75 min · 1,160 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 78% on time.
- Tuesdays78% on time · p90 45 min · 1,308 flights
- Saturdays76% on time · p90 45 min · 1,079 flights
- Wednesdays76% on time · p90 45 min · 1,330 flights
- Mondays75% on time · p90 45 min · 1,422 flights
- Fridays74% on time · p90 50 min · 1,435 flights
- Sundays70% on time · p90 55 min · 1,383 flights
- Thursdays70% on time · p90 55 min · 1,429 flights
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