Route · IAH → MDW · 2020–2025 BTS data
Houston to Chicago
The IAH–MDW corridor (Houston, TX → Chicago, IL) runs ahead of the national average, served by 3 carriers across roughly 917 miles.
Data updated 2026-06-13
- 82.2%
- On-time
- +3.2 pts
- vs US avg
- 76 min
- Delay when late
- 2,473
- Flights
Cancelled
1.7%
Best Month
Feb 2024 96%
Worst Month
May 2024 63%
Distance
917 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Nov 2024 | 30 | 9 | 0 | 0 | F9 |
| Aug 2024 | 31 | 9 | 0 | 0 | F9,WN |
| Jul 2024 | 64 | 15 | 2 | 1 | F9,WN |
| Jun 2024 | 64 | 16 | 0 | 1 | F9,WN |
| May 2024 | 84 | 31 | 2 | 0 | F9,WN |
| Apr 2024 | 79 | 13 | 0 | 0 | F9,WN |
| Mar 2024 | 68 | 11 | 0 | 0 | WN |
| Feb 2024 | 54 | 2 | 0 | 0 | WN |
| Jan 2024 | 64 | 10 | 6 | 0 | WN |
| Dec 2023 | 85 | 7 | 2 | 2 | WN |
| Nov 2023 | 81 | 11 | 0 | 0 | WN |
| Oct 2023 | 69 | 14 | 0 | 0 | WN |
| Sep 2023 | 52 | 3 | 0 | 0 | WN |
| Aug 2023 | 56 | 5 | 0 | 0 | WN |
| Jul 2023 | 52 | 11 | 0 | 0 | WN |
| Jun 2023 | 52 | 13 | 0 | 0 | WN |
| May 2023 | 53 | 10 | 1 | 0 | WN |
| Apr 2023 | 43 | 12 | 0 | 0 | WN |
| Mar 2023 | 62 | 12 | 1 | 0 | WN |
| Feb 2023 | 56 | 5 | 0 | 0 | WN |
| Jan 2023 | 62 | 12 | 2 | 1 | WN |
| Dec 2022 | 60 | 14 | 9 | 0 | WN |
| Nov 2022 | 55 | 8 | 0 | 0 | WN |
| Oct 2022 | 62 | 6 | 0 | 1 | WN |
Cancellation Rate
1.7%
25 of 1,438 flights
Diversion Rate
0.4%
6 of 1,438 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 →MDW - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Destination airport →Compare the two airports
See IAH and MDW 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–MDW.
Routes with a similar on-time rate
What the Data Says About IAH to MDW
Bureau of Transportation Statistics records show Houston to Chicago (IAH to MDW) running a 82.2% on-time rate over 2,473 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 76.1 minutes. The 917-mile corridor is served by 3 carriers, and over the last 24 months 1.7% of 1,438 flights were cancelled, 0.4% diverted.
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 96% on-time, while May 2024 came in at just 63% - a 33-point swing worth factoring into travel timing.
Frequently Asked Questions
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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.