Route · SJU → IAH · 2020–2025 BTS data
San Juan to Houston
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SJU to IAH (San Juan to Houston) ranks #2499 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 84.4%
- On-time
- +5.4 pts
- vs US avg
- 75 min
- Delay when late
- 4,933
- Flights
- #2499 of 4927
- Corpus placement
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 |
SJU–IAH seasonal on-time pattern
Best: November (89.2%) · weakest: April (77.1%)
Strongest calendar month
November
89.2% on-time · ~62 flights/mo
Busiest calendar month
July
~92 flights/mo avg
Weakest calendar month
April
77.1% on-time · ~75 flights/mo
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.
SJU on-time profileIAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
IAH on-time profileCompare the two airports
See SJU and IAH side by side on delays, cancellations, and reliability.
Compare SJU vs IAHOrigin-hub reliability standing
Mid-pack among SJU departures
From SJU, this corridor sits with 14 other 75–85% on-time routes out of 21 tracked departures, not the hub's reliability leaders (1 at ≥85%) and not the softest ( 6 below 75%). Destination: Houston · fleet on-time rank #1456 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to SJU–IAH.
Routes with a similar on-time rate
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.
On the multi-year calendar, SJU–IAH peaks in November at 89.2% on-time while July carries the heaviest traffic (~92 flights per month) ; the softest month is April at 77.1%, a 12.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does SJU to IAH rank among US routes by traffic? ▼
How often are flights delayed from SJU to IAH? ▼
What is the cancellation rate for SJU to IAH? ▼
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Airports on this route
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.
Using SJU–IAH data
SJU–IAH runs 5.4 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare SJU and IAH airport profiles: delay causes and top routes differ even on the same corridor. SJU airport
- If your dates flex, November (89.2% on-time) beats April (77.1%) on this corridor. Seasonal chart
- 4 other routes post a similar 84.4% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.