Route
IAH → SFO
George Bush Intercontinental Airport San Francisco International Airport
Alerts at IAH and SFO
How punctual is this route?
- On-time arrivals
- 78.2%
- Less than 15 minutes late
- Cancelled
- 0.4%
- Of scheduled flights
- Average delay when late
- 66 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3,578
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 49%
- Late-arriving aircraft 25%
- Airline (crew, maintenance, cleaning) 23%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 89.3% | 289 |
| October 2025 | 82.2% | 306 |
| November 2025 | 81.6% | 299 |
| December 2025 | 79.7% | 311 |
| January 2026 | 85.2% | 303 |
| February 2026 | 85.5% | 277 |
| March 2026 | 88.5% | 310 |
| April 2026 | 74.2% | 300 |
| May 2026 | 66.4% | 307 |
| June 2026 | 57.2% | 300 |
| July 2026 | 68.2% | 297 |
| August 2026 | 81.4% | 279 |
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 | 3,578 | 78.2% | 0.4% | 66 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA2358
28% late · 365 flights
-
UA1768
11% late · 350 flights
-
UA589
20% late · 348 flights
-
UA487
3% late · 319 flights
-
UA2611
23% late · 263 flights
-
UA1609
19% late · 252 flights
-
UA1341
40% late · 210 flights
-
UA382
24% late · 201 flights
-
UA2388
33% late · 163 flights
-
UA2744
31% late · 124 flights
-
UA334
21% late · 97 flights
-
UA234
14% late · 84 flights
-
UA2464
4% late · 55 flights
-
UA2756
38% late · 47 flights
-
UA1354
11% late · 45 flights
-
UA1181
3% late · 37 flights
-
UA241
11% late · 37 flights
-
UA2751
69% late · 35 flights
-
UA2855
3% late · 33 flights
-
UA1418
16% late · 32 flights
-
UA1507
53% late · 32 flights
-
UA1535
26% late · 31 flights
-
UA1976
60% late · 31 flights
-
UA445
19% late · 31 flights
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