Route · IAH → IAD · 2020–2025 BTS data
Houston to Washington
The IAH–IAD corridor (Houston, TX → Washington, DC) runs ahead of the national average, served by 3 carriers across roughly 1,190 miles.
Data updated 2026-06-13
- 81.2%
- On-time
- +2.2 pts
- vs US avg
- 68 min
- Delay when late
- 10,004
- Flights
Cancelled
0.9%
Best Month
Sep 2025 93%
Worst Month
Jul 2025 58%
Distance
1,190 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 140 | 20 | 0 | 0 | UA |
| Nov 2025 | 148 | 28 | 0 | 0 | UA |
| Oct 2025 | 180 | 27 | 0 | 0 | UA |
| Sep 2025 | 193 | 14 | 0 | 0 | UA |
| Aug 2025 | 174 | 46 | 0 | 0 | UA |
| Jul 2025 | 155 | 65 | 1 | 0 | UA |
| Jun 2025 | 175 | 63 | 3 | 0 | UA |
| May 2025 | 186 | 41 | 1 | 1 | UA |
| Apr 2025 | 181 | 30 | 0 | 0 | UA |
| Mar 2025 | 153 | 29 | 0 | 0 | UA |
| Feb 2025 | 116 | 16 | 0 | 0 | UA |
| Jan 2025 | 130 | 27 | 7 | 0 | UA |
| Dec 2024 | 137 | 32 | 0 | 0 | UA |
| Nov 2024 | 149 | 22 | 0 | 0 | UA |
| Oct 2024 | 156 | 19 | 0 | 0 | UA |
| Sep 2024 | 150 | 20 | 1 | 0 | UA |
| Aug 2024 | 155 | 42 | 2 | 2 | UA |
| Jul 2024 | 155 | 63 | 6 | 1 | UA |
| Jun 2024 | 150 | 42 | 2 | 1 | UA |
| May 2024 | 155 | 62 | 0 | 0 | UA |
| Apr 2024 | 120 | 33 | 0 | 0 | UA |
| Mar 2024 | 126 | 26 | 0 | 0 | UA |
| Feb 2024 | 116 | 22 | 1 | 0 | UA |
| Jan 2024 | 121 | 37 | 9 | 0 | UA |
Cancellation Rate
0.9%
33 of 3,621 flights
Diversion Rate
0.1%
5 of 3,621 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 →IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
Destination airport →Compare the two airports
See IAH and IAD 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–IAD.
Routes with a similar on-time rate
What the Data Says About IAH to IAD
10,004 tracked flights put the IAH to IAD pairing (Houston to Washington) at a 81.2% on-time rate, squarely in line with the wider network. Delays that do occur run 68.4 minutes on average. Across the 1,190-mile route and its 3 carriers, the trailing 24 months show 0.9% cancelled and 0.1% diverted (3,621 flights sampled).
The monthly split is wide on this route: Sep 2025 posted the strongest performance at 93% on-time, while Jul 2025 came in at just 58% - a 35-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.