Historical on-time performance
Houston to Chicago
937 miData through May 2026Source: US DOT · BTS
Flights on HOU–MDW arrive on time 73% of the time over the last 12 months.
On-time rate73%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.2%of scheduled flights
based on 1,844 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time73%Medianon timep9040 minCancel1.2%Flights1,844
Why flights run late
Delay causes
- Airline34%
- Weather5%
- Air traffic (NAS)17%
- Late aircraft44%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline18%
- Weather64%
- Air traffic (NAS)18%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 22 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 HOU → 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 — 89% on time.
- Mornings89% on time · p90 10 min · 1,830 flights
- Middays80% on time · p90 30 min · 795 flights
- Evenings71% on time · p90 50 min · 814 flights
- Overnights69% on time · p90 50 min · 996 flights
- Afternoons67% on time · p90 50 min · 920 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 82% on time.
- Saturdays82% on time · p90 25 min · 699 flights
- Wednesdays82% on time · p90 25 min · 733 flights
- Tuesdays80% on time · p90 30 min · 738 flights
- Thursdays77% on time · p90 35 min · 797 flights
- Fridays76% on time · p90 40 min · 811 flights
- Mondays74% on time · p90 40 min · 806 flights
- Sundays74% on time · p90 40 min · 771 flights
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