Historical on-time performance
Austin to Chicago
972 miData through May 2026Source: US DOT · BTS
Flights on AUS–MDW arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights
based on 1,351 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time77%Medianon timep9040 minCancel1.0%Flights1,351
Why flights run late
Delay causes
- Airline27%
- Weather5%
- Air traffic (NAS)15%
- Late aircraft53%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline21%
- Weather79%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 14 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 AUS → MDW
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 — 91% on time.
- Mornings91% on time · p90 10 min · 1,403 flights
- Middays86% on time · p90 20 min · 939 flights
- Afternoons72% on time · p90 40 min · 817 flights
- Overnights70% on time · p90 70 min · 592 flights
- Evenings63% on time · p90 60 min · 619 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 86% on time.
- Saturdays86% on time · p90 20 min · 456 flights
- Tuesdays83% on time · p90 25 min · 621 flights
- Wednesdays82% on time · p90 30 min · 620 flights
- Fridays79% on time · p90 30 min · 689 flights
- Thursdays78% on time · p90 35 min · 677 flights
- Mondays78% on time · p90 35 min · 674 flights
- Sundays74% on time · p90 50 min · 633 flights
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