Route
IAH → SAN
George Bush Intercontinental Airport San Diego International Airport
Alerts at IAH and SAN
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Watch Ground Delay Program SAN
Ground Delay Program at San Diego International Airport (SAN): Average 37 minutes, up to 1 hour and 11 minutes
Reason: airport volume
Airport status
How punctual is this route?
- On-time arrivals
- 81.0%
- Less than 15 minutes late
- Cancelled
- 0.2%
- Of scheduled flights
- Average delay when late
- 61 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,686
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 34%
- Air traffic control & airport 32%
- Airline (crew, maintenance, cleaning) 29%
- Extreme weather 5%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 89.0% | 137 |
| October 2025 | 84.9% | 147 |
| November 2025 | 79.6% | 142 |
| December 2025 | 82.6% | 145 |
| January 2026 | 83.5% | 128 |
| February 2026 | 91.3% | 127 |
| March 2026 | 86.7% | 152 |
| April 2026 | 81.7% | 142 |
| May 2026 | 82.6% | 149 |
| June 2026 | 71.1% | 142 |
| July 2026 | 70.4% | 144 |
| August 2026 | 69.5% | 131 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| United Airlines | 1,686 | 81.0% | 0.2% | 61 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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UA2491
16% late · 365 flights
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UA2399
20% late · 231 flights
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UA2690
27% late · 124 flights
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UA1913
16% late · 109 flights
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UA1911
13% late · 85 flights
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UA1072
17% late · 77 flights
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UA1373
20% late · 76 flights
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UA2638
17% late · 55 flights
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UA1868
25% late · 53 flights
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UA2371
8% late · 49 flights
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UA2407
41% late · 46 flights
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UA2751
26% late · 46 flights
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UA2300
13% late · 45 flights
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UA2038
5% late · 37 flights
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UA510
11% late · 37 flights
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UA1216
29% late · 36 flights
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UA2418
17% late · 35 flights
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UA2461
26% late · 35 flights
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UA1581
13% late · 31 flights
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UA2486
21% late · 24 flights
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UA1379
29% late · 21 flights
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UA2617
5% late · 21 flights
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