Route
SFO → IAH
San Francisco International Airport George Bush Intercontinental Airport
Alerts at SFO and IAH
How punctual is this route?
- On-time arrivals
- 84.0%
- Less than 15 minutes late
- Cancelled
- 0.3%
- Of scheduled flights
- Average delay when late
- 58 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3,578
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 40%
- Late-arriving aircraft 32%
- Air traffic control & airport 27%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 92.4% | 289 |
| October 2025 | 90.1% | 306 |
| November 2025 | 80.8% | 299 |
| December 2025 | 83.9% | 311 |
| January 2026 | 85.7% | 303 |
| February 2026 | 87.0% | 277 |
| March 2026 | 87.3% | 310 |
| April 2026 | 88.3% | 300 |
| May 2026 | 78.8% | 307 |
| June 2026 | 81.9% | 300 |
| July 2026 | 76.9% | 297 |
| August 2026 | 74.7% | 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 | 84.0% | 0.3% | 58 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA2305
19% late · 328 flights
-
UA505
18% late · 327 flights
-
UA1387
25% late · 288 flights
-
UA512
8% late · 182 flights
-
UA686
5% late · 180 flights
-
UA2322
25% late · 164 flights
-
UA2168
3% late · 159 flights
-
UA604
19% late · 156 flights
-
UA2855
16% late · 148 flights
-
UA776
8% late · 144 flights
-
UA1687
3% late · 126 flights
-
UA2498
12% late · 121 flights
-
UA1788
2% late · 106 flights
-
UA1259
42% late · 103 flights
-
UA2002
30% late · 103 flights
-
UA2047
7% late · 95 flights
-
UA1702
19% late · 65 flights
-
UA1439
11% late · 61 flights
-
UA619
31% late · 56 flights
-
UA277
22% late · 53 flights
-
UA2194
14% late · 50 flights
-
UA1311
0% late · 37 flights
-
UA1364
27% late · 37 flights
-
UA2041
17% late · 37 flights
Reviews
No reviews yet. Be the first to review this route.