Route · SFO → IAH · 2020–2025 BTS data
San Francisco to Houston
The SFO–IAH corridor (San Francisco, CA → Houston, TX) runs ahead of the national average, served by 2 carriers across roughly 1,635 miles.
Data updated 2026-06-13
- 85.6%
- On-time
- +6.6 pts
- vs US avg
- 64 min
- Delay when late
- 17,386
- Flights
Cancelled
1.2%
Best Month
Sep 2025 92%
Worst Month
Dec 2024 72%
Distance
1,635 mi
Carriers
2
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 311 | 50 | 0 | 0 | UA |
| Nov 2025 | 299 | 57 | 2 | 0 | UA |
| Oct 2025 | 306 | 30 | 1 | 1 | UA |
| Sep 2025 | 289 | 22 | 0 | 0 | UA |
| Aug 2025 | 299 | 62 | 1 | 1 | UA |
| Jul 2025 | 299 | 52 | 0 | 6 | UA |
| Jun 2025 | 296 | 61 | 3 | 7 | UA |
| May 2025 | 303 | 40 | 1 | 0 | UA |
| Apr 2025 | 291 | 25 | 0 | 1 | UA |
| Mar 2025 | 284 | 44 | 0 | 0 | UA |
| Feb 2025 | 229 | 22 | 0 | 0 | UA |
| Jan 2025 | 238 | 40 | 11 | 1 | UA |
| Dec 2024 | 282 | 79 | 3 | 0 | UA |
| Nov 2024 | 268 | 48 | 1 | 0 | UA |
| Oct 2024 | 279 | 28 | 0 | 1 | UA |
| Sep 2024 | 270 | 22 | 0 | 1 | UA |
| Aug 2024 | 280 | 42 | 0 | 1 | UA |
| Jul 2024 | 279 | 57 | 18 | 2 | UA |
| Jun 2024 | 270 | 44 | 1 | 4 | UA |
| May 2024 | 257 | 45 | 3 | 2 | UA |
| Apr 2024 | 240 | 29 | 0 | 0 | UA |
| Mar 2024 | 248 | 35 | 0 | 1 | UA |
| Feb 2024 | 230 | 26 | 2 | 0 | UA |
| Jan 2024 | 251 | 42 | 30 | 2 | UA |
Cancellation Rate
1.2%
77 of 6,598 flights
Diversion Rate
0.5%
31 of 6,598 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SFO - San Francisco
Full on-time, delay-cause, and seasonal performance for San Francisco, CA.
Origin airport →IAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
Destination airport →Compare the two airports
See SFO 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 SFO–IAH.
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What the Data Says About SFO to IAH
San Francisco to Houston (SFO to IAH) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.6% on-time rate across 17,386 flights, with delays that do happen averaging 63.5 minutes. The corridor runs roughly 1,635 miles and is served by 2 carriers. Over the most recent 24 months, 77 of 6,598 flights were cancelled (1.2%) and 31 diverted (0.5%).
The monthly split is wide on this route: Sep 2025 posted the strongest performance at 92% on-time, while Dec 2024 came in at just 72% - a 20-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.