Route · IAH → SJU · 2020–2025 BTS data
Houston to San Juan
The IAH–SJU corridor (Houston, TX → San Juan, PR) runs ahead of the national average, served by 3 carriers across roughly 2,007 miles.
Data updated 2026-06-13
- 81.9%
- On-time
- +2.9 pts
- vs US avg
- 72 min
- Delay when late
- 4,923
- Flights
Cancelled
1.1%
Best Month
May 2025 92%
Worst Month
Jul 2024 58%
Distance
2,007 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 92 | 21 | 1 | 0 | NK,UA |
| Nov 2025 | 68 | 17 | 0 | 0 | UA,NK |
| Oct 2025 | 70 | 10 | 0 | 0 | UA,NK |
| Sep 2025 | 68 | 7 | 0 | 0 | UA,NK |
| Aug 2025 | 93 | 32 | 0 | 0 | NK,UA |
| Jul 2025 | 111 | 34 | 0 | 0 | UA,NK |
| Jun 2025 | 104 | 27 | 1 | 0 | UA,NK |
| May 2025 | 83 | 7 | 0 | 0 | NK,UA |
| Apr 2025 | 77 | 9 | 0 | 0 | NK,UA |
| Mar 2025 | 98 | 17 | 0 | 0 | UA,NK |
| Feb 2025 | 84 | 16 | 0 | 0 | UA,NK |
| Jan 2025 | 98 | 12 | 3 | 0 | UA,NK |
| Dec 2024 | 97 | 10 | 1 | 0 | NK,UA |
| Nov 2024 | 78 | 13 | 0 | 1 | UA,NK |
| Oct 2024 | 79 | 16 | 0 | 0 | UA,NK |
| Sep 2024 | 52 | 9 | 0 | 0 | UA,NK |
| Aug 2024 | 81 | 17 | 1 | 0 | NK,UA |
| Jul 2024 | 101 | 42 | 8 | 0 | NK,UA |
| Jun 2024 | 91 | 28 | 1 | 1 | NK,UA |
| May 2024 | 86 | 22 | 2 | 0 | NK,UA |
| Apr 2024 | 68 | 9 | 0 | 0 | UA |
| Mar 2024 | 76 | 11 | 0 | 0 | UA |
| Feb 2024 | 70 | 7 | 0 | 0 | UA |
| Jan 2024 | 74 | 20 | 4 | 0 | UA |
Cancellation Rate
1.1%
22 of 1,999 flights
Diversion Rate
0.1%
2 of 1,999 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 →SJU - San Juan
Full on-time, delay-cause, and seasonal performance for San Juan, PR.
Destination airport →Compare the two airports
See IAH and SJU 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–SJU.
Routes with a similar on-time rate
What the Data Says About IAH to SJU
4,923 tracked flights put the IAH to SJU pairing (Houston to San Juan) at a 81.9% on-time rate, squarely in line with the wider network. Delays that do occur run 72.0 minutes on average. Across the 2,007-mile route and its 3 carriers, the trailing 24 months show 1.1% cancelled and 0.1% diverted (1,999 flights sampled).
The monthly split is wide on this route: May 2025 posted the strongest performance at 92% on-time, while Jul 2024 came in at just 58% - a 33-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from IAH to SJU? ▼
What is the cancellation rate for IAH to SJU? ▼
How far is the flight from IAH to SJU? ▼
When is the best time to fly from IAH to SJU? ▼
Flight Guides
Tips and data-driven advice for choosing reliable routes.
Explore PlainFlights
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.