Route Reliability
Houston → San Francisco
IAH–SFO · 1,635 miles · George Bush Intercontinental Airport to San Francisco International Airport
- 80%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 0.5%
- Cancelled
- 3,595
- Flights in the data
Data through May 2026.
United Airlines is the only airline in this data on this route, arriving on time 80% of the time across 3,595 flights. No comparison to make.
What the data says
Morning-you made the right choice.
IAH–SFO flights departing between 3–6 AM arrived on time 97% of the time, versus 66% between 6–9 PM.
Skip Monday if you can.
IAH–SFO flights arrived on time 90% of the time on Tuesdays. On Mondays: 75%.
Slipping a little lately.
IAH–SFO flights arrived on time 77% of the time over the last three months in the data, compared with 84% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon75%(514 flights)
- Tue90%(501 flights)
- Wed80%(518 flights)
- Thu76%(515 flights)
- Fri78%(507 flights)
- Sat83%(499 flights)
- Sun79%(520 flights)
- 3–6 AM97%(361 flights)
- 6–9 AM88%(424 flights)
- 9 AM–12 PM77%(362 flights)
- 12–3 PM84%(665 flights)
- 3–6 PM79%(626 flights)
- 6–9 PM66%(751 flights)
- 9 PM–12 AM80%(385 flights)
Jun 65% → May 67% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 65% | 292 |
| July 2025 | 75% | 299 |
| August 2025 | 81% | 297 |
| September 2025 | 90% | 289 |
| October 2025 | 83% | 304 |
| November 2025 | 82% | 299 |
| December 2025 | 81% | 310 |
| January 2026 | 85% | 297 |
| February 2026 | 86% | 276 |
| March 2026 | 89% | 305 |
| April 2026 | 75% | 299 |
| May 2026 | 67% | 307 |
Same trip, other airports
Keep nerding
Based on 3,595 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.