Route · SAN → IAH · 2020–2025 BTS data
San Diego to Houston
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SAN to IAH (San Diego to Houston) ranks #1252 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 86.8%
- On-time
- +7.8 pts
- vs US avg
- 73 min
- Delay when late
- 9,427
- Flights
- #1252 of 4927
- Corpus placement
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 |
SAN–IAH seasonal on-time pattern
Best: February (93.1%) · weakest: July (77.9%)
Strongest calendar month
February
93.1% on-time · ~115 flights/mo
Busiest calendar month
August
~153 flights/mo avg
Weakest calendar month
July
77.9% on-time · ~146 flights/mo
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.
SAN on-time profileIAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
IAH on-time profileCompare the two airports
See SAN and IAH side by side on delays, cancellations, and reliability.
Compare SAN vs IAHOrigin-hub reliability standing
Among SAN's stronger departures
SAN → IAH posts a 86.8% on-time rate, landing in the ≥85% band with 13 of 51 BTS-tracked routes leaving San Diego. The same hub also shows 34 mid-band and 4 challenged departures · fleet-wide on-time rank #690 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to SAN–IAH.
Routes with a similar on-time rate
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.
On the multi-year calendar, SAN–IAH peaks in February at 93.1% on-time while August carries the heaviest traffic (~153 flights per month) ; the softest month is July at 77.9%, a 15.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does SAN to IAH rank among US routes by traffic? ▼
How often are flights delayed from SAN to IAH? ▼
What is the cancellation rate for SAN to IAH? ▼
How far is the flight from SAN to IAH? ▼
When is the best time to fly from SAN to IAH? ▼
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 SAN–IAH data
SAN–IAH runs 7.8 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare SAN and IAH airport profiles: delay causes and top routes differ even on the same corridor. SAN airport
- If your dates flex, February (93.1% on-time) beats July (77.9%) on this corridor. Seasonal chart
- 4 other routes post a similar 86.8% 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.