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Route Reliability

Houston → Chicago

IAH–MDW · 917 miles · George Bush Intercontinental Airport to Chicago Midway International Airport

66
Usually Fine
WanderNerd Reliability Score
71%
Arrive within 15 minutes
25 min
Average arrival delay
1.5%
Cancelled
130
Flights in the data

Data through May 2026.

Frontier Airlines is the only airline in this data on this route, arriving on time 71% of the time across 130 flights. No comparison to make.

What the data says

The 12–3 PM departure wins.

IAH–MDW flights departing between 12–3 PM arrived on time 90% of the time, versus 58% between 6–9 PM.

Mondays have been rough.

IAH–MDW flights arrived on time 87% of the time on Thursdays and just 54% on Mondays. That gap is worth planning around.

Flights on this route

The breakdown

On-time by weekday
  • Mon54%(41 flights)
  • Tue—(1 flights)
  • Wed—(3 flights)
  • Thu87%(15 flights)
  • Fri85%(41 flights)
  • Sat—(7 flights)
  • Sun65%(20 flights)
On-time by departure window
  • 9 AM–12 PM79%(34 flights)
  • 12–3 PM90%(29 flights)
  • 6–9 PM58%(64 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
54%
Dec

Aug 69% → Dec 54% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202569%13
September 202582%17
October 202591%21
November 202570%23
December 202554%13

Same trip, other airports

Keep nerding

Based on 130 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.