Route · IAH → ORD · 2020–2025 BTS data
Houston to Chicago
The IAH–ORD corridor (Houston, TX → Chicago, IL) runs ahead of the national average, served by 42 carriers across roughly 925 miles.
Data updated 2026-06-13
- 81%
- On-time
- +2 pts
- vs US avg
- 82 min
- Delay when late
- 27,946
- Flights
Cancelled
1.5%
Best Month
Feb 2024 89%
Worst Month
May 2024 58%
Distance
925 mi
Carriers
42
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 512 | 128 | 3 | 1 | YX,F9,NK,AA,MQ,UA |
| Nov 2025 | 466 | 142 | 17 | 0 | UA,F9,MQ,NK,AA,YX |
| Oct 2025 | 517 | 107 | 3 | 0 | AA,UA,YX,F9,MQ,NK |
| Sep 2025 | 531 | 75 | 1 | 0 | MQ,UA,NK,YX,F9,AA |
| Aug 2025 | 535 | 139 | 11 | 2 | AA,YX,F9,MQ,NK,OH,UA |
| Jul 2025 | 514 | 168 | 8 | 4 | AA,NK,UA,YX,F9,MQ |
| Jun 2025 | 508 | 161 | 9 | 1 | AA,UA,YX,F9,MQ,NK |
| May 2025 | 504 | 120 | 5 | 0 | AA,NK,OO,UA,F9 |
| Apr 2025 | 433 | 77 | 3 | 0 | F9,NK,UA,YX,AA |
| Mar 2025 | 460 | 87 | 4 | 3 | AA,UA,NK,YX,F9 |
| Feb 2025 | 390 | 66 | 2 | 0 | AA,UA,YX,F9,MQ,NK |
| Jan 2025 | 457 | 66 | 22 | 2 | AA,UA,NK,YX,F9,MQ |
| Dec 2024 | 476 | 121 | 1 | 0 | AA,F9,MQ,NK,UA,YX |
| Nov 2024 | 454 | 59 | 0 | 0 | UA,MQ,NK,YX,F9,AA |
| Oct 2024 | 473 | 53 | 0 | 0 | UA,NK,F9,AA |
| Sep 2024 | 473 | 60 | 1 | 0 | NK,UA,AA,F9 |
| Aug 2024 | 502 | 121 | 4 | 2 | AA,F9,NK,UA |
| Jul 2024 | 495 | 187 | 35 | 1 | AA,F9,NK,UA |
| Jun 2024 | 489 | 146 | 4 | 1 | AA,F9,MQ,NK,UA |
| May 2024 | 489 | 204 | 7 | 5 | AA,F9,MQ,NK,UA |
| Apr 2024 | 428 | 84 | 2 | 1 | AA,MQ,NK,UA |
| Mar 2024 | 371 | 83 | 0 | 1 | AA,MQ,NK,UA |
| Feb 2024 | 313 | 33 | 0 | 1 | AA,MQ,NK,UA |
| Jan 2024 | 359 | 99 | 26 | 1 | AA,MQ,YX,NK,UA |
Cancellation Rate
1.5%
168 of 11,149 flights
Diversion Rate
0.2%
26 of 11,149 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
IAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
Origin airport →ORD - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Destination airport →Compare the two airports
See IAH and ORD side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to IAH–ORD.
Routes with a similar on-time rate
What the Data Says About IAH to ORD
27,946 tracked flights put the IAH to ORD pairing (Houston to Chicago) at a 81% on-time rate, squarely in line with the wider network. Delays that do occur run 82.0 minutes on average. Across the 925-mile route and its 42 carriers, the trailing 24 months show 1.5% cancelled and 0.2% diverted (11,149 flights sampled).
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 89% on-time, while May 2024 came in at just 58% - a 31-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from IAH to ORD? ▼
What is the cancellation rate for IAH to ORD? ▼
How far is the flight from IAH to ORD? ▼
When is the best time to fly from IAH to ORD? ▼
Flight Guides
Tips and data-driven advice for choosing reliable routes.
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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.