Route · SAN → IAH · 2020–2025 BTS data
San Diego to Houston
The SAN–IAH corridor (San Diego, CA → Houston, TX) runs ahead of the national average, served by 6 carriers across roughly 1,303 miles.
Data updated 2026-06-13
- 86.8%
- On-time
- +7.8 pts
- vs US avg
- 73 min
- Delay when late
- 9,427
- Flights
Cancelled
1.9%
Best Month
Feb 2024 93%
Worst Month
Dec 2024 70%
Distance
1,303 mi
Carriers
6
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 145 | 20 | 0 | 0 | UA |
| Nov 2025 | 142 | 31 | 0 | 0 | UA |
| Oct 2025 | 147 | 15 | 0 | 0 | UA |
| Sep 2025 | 137 | 16 | 1 | 0 | UA |
| Aug 2025 | 141 | 30 | 2 | 0 | UA |
| Jul 2025 | 141 | 33 | 3 | 2 | UA |
| Jun 2025 | 141 | 34 | 2 | 1 | UA |
| May 2025 | 145 | 27 | 3 | 0 | UA |
| Apr 2025 | 141 | 15 | 0 | 1 | UA |
| Mar 2025 | 142 | 13 | 1 | 0 | UA |
| Feb 2025 | 122 | 13 | 0 | 0 | UA |
| Jan 2025 | 129 | 15 | 5 | 2 | UA |
| Dec 2024 | 148 | 44 | 2 | 1 | UA |
| Nov 2024 | 148 | 12 | 0 | 0 | UA |
| Oct 2024 | 147 | 27 | 1 | 0 | UA |
| Sep 2024 | 143 | 18 | 0 | 0 | NK,UA |
| Aug 2024 | 181 | 34 | 0 | 2 | NK,UA |
| Jul 2024 | 185 | 49 | 14 | 3 | NK,UA |
| Jun 2024 | 180 | 34 | 1 | 0 | NK,UA |
| May 2024 | 173 | 32 | 6 | 4 | NK,UA |
| Apr 2024 | 141 | 12 | 0 | 1 | UA |
| Mar 2024 | 137 | 13 | 0 | 0 | UA |
| Feb 2024 | 113 | 8 | 0 | 0 | UA |
| Jan 2024 | 131 | 11 | 26 | 0 | UA |
Cancellation Rate
1.9%
67 of 3,500 flights
Diversion Rate
0.5%
17 of 3,500 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SAN - San Diego
Full on-time, delay-cause, and seasonal performance for San Diego, CA.
Origin airport →IAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
Destination airport →Compare the two airports
See SAN 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 SAN–IAH.
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What the Data Says About SAN to IAH
San Diego to Houston (SAN to IAH) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 86.8% on-time rate across 9,427 flights, with delays that do happen averaging 72.9 minutes. The corridor runs roughly 1,303 miles and is served by 6 carriers. Over the most recent 24 months, 67 of 3,500 flights were cancelled (1.9%) and 17 diverted (0.5%).
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 93% on-time, while Dec 2024 came in at just 70% - a 23-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.