Route · SJU → IAH · 2020–2025 BTS data
San Juan to Houston
The SJU–IAH corridor (San Juan, PR → Houston, TX) runs ahead of the national average, served by 3 carriers across roughly 2,007 miles.
Data updated 2026-06-13
- 84.4%
- On-time
- +5.4 pts
- vs US avg
- 75 min
- Delay when late
- 4,933
- Flights
Cancelled
1.2%
Best Month
Sep 2025 94%
Worst Month
Mar 2024 70%
Distance
2,007 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 91 | 11 | 0 | 0 | NK,UA |
| Nov 2025 | 68 | 14 | 0 | 0 | UA,NK |
| Oct 2025 | 70 | 15 | 0 | 0 | UA,NK |
| Sep 2025 | 68 | 4 | 0 | 0 | UA,NK |
| Aug 2025 | 94 | 17 | 0 | 1 | NK,UA |
| Jul 2025 | 111 | 8 | 1 | 0 | UA,NK |
| Jun 2025 | 104 | 9 | 1 | 2 | UA,NK |
| May 2025 | 82 | 17 | 0 | 0 | NK,UA |
| Apr 2025 | 77 | 14 | 0 | 0 | NK,UA |
| Mar 2025 | 99 | 18 | 0 | 0 | UA,NK |
| Feb 2025 | 84 | 10 | 0 | 0 | UA,NK |
| Jan 2025 | 97 | 17 | 5 | 1 | UA,NK |
| Dec 2024 | 96 | 15 | 1 | 0 | NK,UA |
| Nov 2024 | 78 | 11 | 0 | 0 | UA,NK |
| Oct 2024 | 80 | 11 | 0 | 0 | UA,NK |
| Sep 2024 | 51 | 14 | 0 | 0 | UA,NK |
| Aug 2024 | 83 | 18 | 2 | 0 | NK,UA |
| Jul 2024 | 103 | 21 | 7 | 1 | NK,UA |
| Jun 2024 | 92 | 11 | 2 | 3 | NK,UA |
| May 2024 | 85 | 23 | 2 | 3 | NK,UA |
| Apr 2024 | 68 | 11 | 0 | 0 | UA |
| Mar 2024 | 76 | 23 | 1 | 2 | UA |
| Feb 2024 | 70 | 10 | 0 | 0 | UA |
| Jan 2024 | 75 | 19 | 2 | 0 | UA |
Cancellation Rate
1.2%
24 of 2,002 flights
Diversion Rate
0.6%
13 of 2,002 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SJU - San Juan
Full on-time, delay-cause, and seasonal performance for San Juan, PR.
Origin airport →IAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
Destination airport →Compare the two airports
See SJU and IAH side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SJU–IAH.
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What the Data Says About SJU to IAH
Bureau of Transportation Statistics records show San Juan to Houston (SJU to IAH) running a 84.4% on-time rate over 4,933 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 74.6 minutes. The 2,007-mile corridor is served by 3 carriers, and over the last 24 months 1.2% of 2,002 flights were cancelled, 0.6% diverted.
The monthly split is wide on this route: Sep 2025 posted the strongest performance at 94% on-time, while Mar 2024 came in at just 70% - a 24-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.