Route · IAH → BWI · 2020–2025 BTS data
Houston to Baltimore
The IAH–BWI corridor (Houston, TX → Baltimore, MD) runs ahead of the national average, served by 14 carriers across roughly 1,235 miles.
Data updated 2026-06-13
- 80.6%
- On-time
- +1.6 pts
- vs US avg
- 71 min
- Delay when late
- 5,948
- Flights
Cancelled
1.6%
Best Month
Sep 2024 93%
Worst Month
Jul 2024 45%
Distance
1,235 mi
Carriers
14
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 105 | 24 | 1 | 0 | F9,NK,UA |
| Nov 2025 | 122 | 19 | 0 | 0 | OO,UA,F9,NK |
| Oct 2025 | 107 | 26 | 0 | 0 | UA,NK |
| Sep 2025 | 106 | 19 | 0 | 1 | UA,OO,NK |
| Aug 2025 | 99 | 34 | 0 | 0 | NK,UA |
| Jul 2025 | 106 | 45 | 2 | 1 | NK,UA |
| Jun 2025 | 95 | 37 | 1 | 1 | UA,NK |
| May 2025 | 103 | 26 | 0 | 0 | UA,NK |
| Apr 2025 | 90 | 18 | 0 | 0 | NK,UA |
| Mar 2025 | 66 | 10 | 0 | 0 | UA,NK |
| Feb 2025 | 79 | 11 | 0 | 1 | UA,NK |
| Jan 2025 | 111 | 22 | 6 | 0 | UA,NK |
| Dec 2024 | 112 | 27 | 0 | 0 | NK,UA |
| Nov 2024 | 107 | 12 | 0 | 0 | UA,NK |
| Oct 2024 | 109 | 13 | 0 | 0 | UA,NK |
| Sep 2024 | 108 | 8 | 0 | 0 | UA,NK |
| Aug 2024 | 122 | 30 | 2 | 4 | NK,UA |
| Jul 2024 | 97 | 53 | 6 | 0 | NK,UA |
| Jun 2024 | 115 | 29 | 1 | 0 | NK,UA |
| May 2024 | 109 | 35 | 1 | 0 | NK,UA |
| Apr 2024 | 102 | 20 | 0 | 0 | NK,UA |
| Mar 2024 | 61 | 7 | 1 | 0 | NK,UA |
| Feb 2024 | 65 | 6 | 0 | 0 | NK,UA |
| Jan 2024 | 72 | 8 | 16 | 0 | NK,UA |
Cancellation Rate
1.6%
37 of 2,368 flights
Diversion Rate
0.3%
8 of 2,368 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 →BWI - Baltimore
Full on-time, delay-cause, and seasonal performance for Baltimore, MD.
Destination airport →Compare the two airports
See IAH and BWI 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–BWI.
Routes with a similar on-time rate
What the Data Says About IAH to BWI
5,948 tracked flights put the IAH to BWI pairing (Houston to Baltimore) at a 80.6% on-time rate, squarely in line with the wider network. Delays that do occur run 70.9 minutes on average. Across the 1,235-mile route and its 14 carriers, the trailing 24 months show 1.6% cancelled and 0.3% diverted (2,368 flights sampled).
The monthly split is wide on this route: Sep 2024 posted the strongest performance at 93% on-time, while Jul 2024 came in at just 45% - a 47-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.