Route · IAH → BHM · 2020–2025 BTS data
Houston to Birmingham
The IAH–BHM corridor (Houston, TX → Birmingham, AL) runs ahead of the national average, served by 11 carriers across roughly 562 miles.
Data updated 2026-06-13
- 83%
- On-time
- +4 pts
- vs US avg
- 73 min
- Delay when late
- 2,876
- Flights
Cancelled
1.9%
Best Month
Nov 2023 87%
Worst Month
Jul 2021 46%
Distance
562 mi
Carriers
11
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Jun 2025 | 48 | 18 | 2 | 0 | OO |
| Nov 2024 | 63 | 8 | 0 | 0 | OO |
| Oct 2024 | 31 | 8 | 0 | 0 | OO |
| Aug 2024 | 45 | 7 | 1 | 0 | OO |
| Jul 2024 | 60 | 32 | 7 | 1 | OO |
| Dec 2023 | 37 | 6 | 0 | 0 | OO |
| Nov 2023 | 79 | 10 | 0 | 0 | OO |
| Oct 2023 | 62 | 15 | 0 | 0 | OO,UA |
| Sep 2023 | 65 | 12 | 0 | 0 | OO,UA |
| Apr 2023 | 61 | 8 | 1 | 0 | OO |
| Mar 2023 | 41 | 5 | 0 | 1 | OO |
| Feb 2023 | 57 | 10 | 0 | 0 | OO |
| Sep 2022 | 35 | 4 | 0 | 0 | OO,UA,YV |
| May 2022 | 86 | 17 | 1 | 1 | OO,YV |
| Apr 2022 | 60 | 8 | 1 | 0 | OO,YV |
| Mar 2022 | 36 | 8 | 0 | 0 | OO,YV |
| Feb 2022 | 41 | 6 | 0 | 1 | YV,OO |
| Jan 2022 | 58 | 10 | 7 | 0 | OO,YV |
| Oct 2021 | 89 | 31 | 1 | 1 | OO,UA,YV |
| Sep 2021 | 102 | 18 | 1 | 0 | OO,YV |
| Aug 2021 | 93 | 37 | 4 | 1 | OO |
| Jul 2021 | 93 | 50 | 2 | 0 | OO,YV |
| Jun 2021 | 87 | 36 | 0 | 0 | OO,YV |
| May 2021 | 71 | 16 | 0 | 1 | OO,YV |
Cancellation Rate
1.9%
28 of 1,500 flights
Diversion Rate
0.5%
7 of 1,500 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 →BHM - Birmingham
Full on-time, delay-cause, and seasonal performance for Birmingham, AL.
Destination airport →Compare the two airports
See IAH and BHM 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–BHM.
Routes with a similar on-time rate
What the Data Says About IAH to BHM
Bureau of Transportation Statistics records show Houston to Birmingham (IAH to BHM) running a 83% on-time rate over 2,876 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 72.5 minutes. The 562-mile corridor is served by 11 carriers, and over the last 24 months 1.9% of 1,500 flights were cancelled, 0.5% diverted.
The monthly split is wide on this route: Nov 2023 posted the strongest performance at 87% on-time, while Jul 2021 came in at just 46% - a 41-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.