Route
IAH → SAT
George Bush Intercontinental Airport San Antonio International Airport
How punctual is this route?
- On-time arrivals
- 83.1%
- Less than 15 minutes late
- Cancelled
- 0.4%
- Of scheduled flights
- Average delay when late
- 63 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,373
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 45%
- Airline (crew, maintenance, cleaning) 35%
- Air traffic control & airport 13%
- Extreme weather 6%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 87.3% | 229 |
| October 2025 | 85.4% | 213 |
| November 2025 | 83.4% | 207 |
| December 2025 | 83.9% | 217 |
| January 2026 | 90.4% | 179 |
| February 2026 | 91.6% | 168 |
| March 2026 | 82.1% | 234 |
| April 2026 | 82.8% | 215 |
| May 2026 | 81.6% | 185 |
| June 2026 | 69.0% | 171 |
| July 2026 | 73.3% | 180 |
| August 2026 | 84.6% | 175 |
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 | 2,247 | 83.0% | 0.4% | 62 min |
| SkyWest Airlines | 126 | 84.0% | 0.8% | 75 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA1477
27% late · 365 flights
-
UA1542
22% late · 340 flights
-
UA468
9% late · 233 flights
-
UA1371
15% late · 207 flights
-
UA697
15% late · 204 flights
-
UA2250
8% late · 198 flights
-
UA2198
27% late · 131 flights
-
UA1475
13% late · 106 flights
-
UA2003
3% late · 99 flights
-
OO5379
19% late · 59 flights
-
UA1819
23% late · 47 flights
-
UA1554
3% late · 37 flights
-
UA730
19% late · 37 flights
-
UA1407
25% late · 32 flights
-
UA2247
12% late · 26 flights
-
UA1464
21% late · 24 flights
-
UA1528
23% late · 24 flights
-
OO5807
18% late · 23 flights
-
UA1455
17% late · 23 flights
-
UA582
14% late · 21 flights
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