Route · IAH → GRK · 2020–2025 BTS data
Houston to Killeen
The IAH–GRK corridor (Houston, TX → Killeen, TX) runs ahead of the national average, served by 3 carriers across roughly 166 miles.
Data updated 2026-06-13
- 83.8%
- On-time
- +4.8 pts
- vs US avg
- 89 min
- Delay when late
- 844
- Flights
Cancelled
2.5%
Best Month
Mar 2020 96%
Worst Month
Jul 2021 49%
Distance
166 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2021 | 48 | 6 | 0 | 0 | OO |
| Nov 2021 | 59 | 3 | 0 | 0 | OO |
| Oct 2021 | 61 | 9 | 1 | 0 | OO |
| Sep 2021 | 59 | 6 | 0 | 0 | OO |
| Aug 2021 | 62 | 10 | 0 | 0 | OO |
| Jul 2021 | 79 | 40 | 3 | 0 | OO |
| Jun 2021 | 73 | 30 | 0 | 0 | OO |
| May 2021 | 49 | 11 | 1 | 0 | OO |
| Apr 2021 | 48 | 5 | 0 | 0 | OO |
| Oct 2020 | 31 | 0 | 0 | 0 | OO |
| Apr 2020 | 30 | 1 | 0 | 0 | EV |
| Mar 2020 | 89 | 4 | 16 | 0 | EV |
| Feb 2020 | 80 | 7 | 0 | 0 | EV |
| Jan 2020 | 76 | 5 | 0 | 3 | EV,YX |
Cancellation Rate
2.5%
21 of 844 flights
Diversion Rate
0.4%
3 of 844 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 →GRK - Killeen
Full on-time, delay-cause, and seasonal performance for Killeen, TX.
Destination airport →Compare the two airports
See IAH and GRK 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–GRK.
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What the Data Says About IAH to GRK
Bureau of Transportation Statistics records show Houston to Killeen (IAH to GRK) running a 83.8% on-time rate over 844 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 89.4 minutes. The 166-mile corridor is served by 3 carriers, and over the last 24 months 2.5% of 844 flights were cancelled, 0.4% diverted.
The monthly split is wide on this route: Mar 2020 posted the strongest performance at 96% on-time, while Jul 2021 came in at just 49% - a 46-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.