Historical on-time performance
Chicago to Houston
917 miData through May 2026Source: US DOT · BTS
No flights recorded for last 12 months on this route.
By airline
How each carrier compares
No airline figures for this window yet.
Why flights run late
Delay causes
Delay-cause data appears once delayed flights are recorded for this window.
When flights don't go
Why flights were cancelled
- Airline40%
- Weather58%
- Air traffic (NAS)2%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 50 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 MDW → IAH
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 — 83% on time.
- Mornings83% on time · p90 25 min · 366 flights
- Middays77% on time · p90 30 min · 248 flights
- Overnights69% on time · p90 50 min · 109 flights · limited
- Evenings62% on time · p90 55 min · 237 flights
- Afternoons62% on time · p90 75 min · 291 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 64% to 79% on time.
- Tuesdays79% on time · p90 30 min · 151 flights · limited
- Sundays74% on time · p90 45 min · 180 flights · limited
- Thursdays74% on time · p90 40 min · 206 flights
- Fridays73% on time · p90 40 min · 233 flights
- Wednesdays71% on time · p90 45 min · 155 flights · limited
- Mondays64% on time · p90 75 min · 230 flights
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