Historical on-time performance
Houston to Chicago
917 miData through Dec 2025Source: 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.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly IAH → MDW
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 55% to 85% on time.
- Mornings85% on time · p90 20 min · 304 flights
- Middays82% on time · p90 40 min · 557 flights
- Afternoons77% on time · p90 40 min · 440 flights
- Overnights64% on time · p90 75 min · 77 flights · limited
- Evenings55% on time · p90 100 min · 127 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 84% on time.
- Tuesdays84% on time · p90 25 min · 200 flights
- Sundays80% on time · p90 40 min · 222 flights
- Thursdays79% on time · p90 45 min · 236 flights
- Saturdays78% on time · p90 45 min · 139 flights · limited
- Fridays77% on time · p90 45 min · 252 flights
- Wednesdays76% on time · p90 45 min · 204 flights
- Mondays72% on time · p90 60 min · 252 flights
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