Chicago, IL → Houston, TX flight delays
ORD → IAH · all airlines · 537 flights · May 2026 · source: US BTS
This route is delayed
26%of the time, by +64 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
74%
Delayed 3h+
0.6%
Cancelled
0%
Avg when late
+64m
Best & worst day to fly
Most on-time
Thursday
delayed 17%
Worst
Monday
delayed 38%
Which airline is most punctual on ORD → IAH?
Republicdelayed 20%
Uniteddelayed 21%
Frontierdelayed 26%
Envoydelayed 33%
Americandelayed 51%
Frequently asked
How often is the Chicago, IL to Houston, TX flight delayed?
About 26% of ORD → IAH flights arrive late (15+ minutes), by an average of 64 minutes when they do, based on 537 flights in May 2026.
Which airline is most punctual on ORD → IAH?
Republic, delayed 20% of the time — the best of the 5 airlines flying this route.
What is the best day to fly ORD → IAH?
Thursday is the most on-time (delayed 17%), while Monday is the worst (delayed 38%).
Airport overviews