Route · ORD → IAH · 2020–2025 BTS data
Chicago to Houston
The ORD–IAH corridor (Chicago, IL → Houston, TX) runs ahead of the national average, served by 42 carriers across roughly 925 miles.
Data updated 2026-06-13
- 80.7%
- On-time
- +1.7 pts
- vs US avg
- 71 min
- Delay when late
- 27,881
- Flights
Cancelled
1.3%
Best Month
Feb 2024 89%
Worst Month
Jul 2024 61%
Distance
925 mi
Carriers
42
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 512 | 135 | 3 | 0 | YX,F9,NK,AA,MQ,UA |
| Nov 2025 | 467 | 102 | 14 | 0 | UA,F9,MQ,NK,AA,YX |
| Oct 2025 | 518 | 110 | 1 | 1 | AA,UA,YX,F9,MQ,NK |
| Sep 2025 | 532 | 84 | 1 | 0 | MQ,UA,NK,YX,F9,AA |
| Aug 2025 | 531 | 145 | 11 | 0 | AA,YX,F9,MQ,NK,OH,UA |
| Jul 2025 | 516 | 183 | 11 | 2 | AA,NK,UA,YX,F9,MQ |
| Jun 2025 | 507 | 173 | 5 | 3 | AA,NK,UA,YX,F9,MQ |
| May 2025 | 506 | 121 | 3 | 5 | AA,NK,OO,UA,F9 |
| Apr 2025 | 434 | 97 | 2 | 0 | F9,NK,UA,YX,AA |
| Mar 2025 | 461 | 82 | 2 | 0 | AA,UA,NK,YX,F9 |
| Feb 2025 | 390 | 80 | 2 | 1 | AA,UA,YX,F9,MQ,NK |
| Jan 2025 | 457 | 111 | 18 | 1 | AA,UA,NK,YX,F9,MQ |
| Dec 2024 | 477 | 112 | 2 | 1 | AA,F9,MQ,NK,UA,YX |
| Nov 2024 | 455 | 75 | 0 | 0 | UA,MQ,NK,YX,F9,AA |
| Oct 2024 | 473 | 51 | 0 | 0 | UA,NK,F9,AA |
| Sep 2024 | 471 | 71 | 1 | 0 | NK,UA,AA,F9 |
| Aug 2024 | 502 | 124 | 4 | 2 | AA,F9,NK,UA |
| Jul 2024 | 495 | 191 | 36 | 7 | AA,F9,NK,UA |
| Jun 2024 | 488 | 125 | 5 | 5 | AA,F9,MQ,NK,UA |
| May 2024 | 490 | 189 | 6 | 8 | AA,F9,MQ,NK,UA |
| Apr 2024 | 429 | 72 | 1 | 1 | AA,MQ,NK,UA |
| Mar 2024 | 371 | 72 | 0 | 2 | AA,MQ,NK,UA |
| Feb 2024 | 313 | 33 | 0 | 0 | AA,MQ,NK,UA |
| Jan 2024 | 360 | 96 | 22 | 4 | AA,MQ,NK,YX,UA |
Cancellation Rate
1.3%
150 of 11,155 flights
Diversion Rate
0.4%
43 of 11,155 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
ORD - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Origin airport →IAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
Destination airport →Compare the two airports
See ORD and IAH side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to ORD–IAH.
Routes with a similar on-time rate
What the Data Says About ORD to IAH
27,881 tracked flights put the ORD to IAH pairing (Chicago to Houston) at a 80.7% on-time rate, squarely in line with the wider network. Delays that do occur run 70.7 minutes on average. Across the 925-mile route and its 42 carriers, the trailing 24 months show 1.3% cancelled and 0.4% diverted (11,155 flights sampled).
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 89% on-time, while Jul 2024 came in at just 61% - a 28-point swing worth factoring into travel timing.
Frequently Asked Questions
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Flight Guides
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.