MDW (Chicago) to IAH (Houston) flights arrive on time 67% of the time. The most reliable airline on this route is Frontier Airlines at 69%. The average delay is 66 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated August 2026.MDW → IAH
MDW (Chicago) to IAH (Houston)
MDW → IAH on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 67% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Frontier Airlines edges out Southwest Airlines on this route — 69% vs 57% on time.
Airline Comparison
Frontier Airlines leads at 69% on time; Southwest Airlines trails at 57%.
Accurate?
Good to know
Departing from MDW
80% on timeTSA is currently ~16 min. Best time: 4 AM (about 5 min).
Arriving at IAH
79% on timeWhen flights into IAH are late, the average delay is 77 minutes. Build buffer if you have ground plans.
If connecting at IAH: TSA is ~10 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Frontier Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of MDW? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated August 2026. Source: Bureau of Transportation Statistics.