SAN to IAH flight delays & on-time performance
Nonstop flights from San Diego International Airport to George Bush Intercontinental Airport · 1,303 miles · Aug 2025 – Jul 2026
- SAN: Airport closed. Closed, expected to reopen Oct 11 at 13:00 UTC.
On-time arrivals
84%
arrived < 15 min late
Cancelled
0.4%
6 flights
Avg arrival delay
12 min
72 min when late
Airlines
1
1,696 flights tracked
Key facts
- Flights from San Diego (SAN) to Houston (IAH) arrived on time 84% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.4% were cancelled, and 5% arrived an hour or more late.
- United Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 6am did best (94% on time); around 11am did worst (69%).
- Tuesday was the most reliable day to fly (89% on time) and Thursday the least (81%).
- The largest source of delay minutes was late-arriving aircraft (54%).
Which airline is most on time from SAN to IAH?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 84% | 0.4% | 12 min | 5.2% | 1,696 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am94%211 flights
- 8am92%222 flights
- 10am89%365 flights
- 11am69%89 flights
- 12pm82%275 flights
- 1pm76%134 flights
- 3pm76%198 flights
- 4pm91%22 flights
- 5pm81%170 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday81%0.4% cancelled
- Tuesday89%0.0% cancelled
- Wednesday86%0.4% cancelled
- Thursday81%1.2% cancelled
- Friday83%0.0% cancelled
- Saturday86%0.0% cancelled
- Sunday85%0.4% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft54%
- Air traffic control & airport congestion26%
- Airline (crew, maintenance, cleaning, fueling)16%
- Extreme weather4%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)67%
- Extreme weather17%
- Air traffic control & airport congestion17%
- Security0%
SAN to IAH: common questions
- How often are SAN to IAH flights on time?
- 84% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from San Diego to Houston cancelled?
- 0.4% of scheduled flights were cancelled (6 of 1,696).
- How long are typical delays?
- Across all flights the average arrival delay was 12 min (early arrivals count as zero). Flights that were late arrived 72 min behind schedule on average, and 5.2% of flights were an hour or more late.
- How long is taxi time at SAN?
- Flights on this route spent 22 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAH to SAN — 81% on time
More flights from San Diego
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SAN → IAH, nonstop flights by US airlines that report to the DOT. How we calculate this.