Flight Reliability
UA 5688 · United Airlines
San Francisco → Tucson (SFO–TUS)93% of its flights flew this route. The rest (ORD–CAE, ORD–FSD) are included in these numbers.
- 82%
- Arrive within 15 minutes
- 3 min
- Average arrival delay
- 0.3%
- Cancelled
- 7 min early
- Median arrival delay
Based on 345 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
UA 5688 departing between 6–9 PM arrived on time 83% of the time, versus 62% between 9 AM–12 PM.
Thursdays have been rough.
UA 5688 arrived on time 90% of the time on Wednesdays and just 74% on Thursdays. That gap is worth planning around.
It basically never cancels.
Out of 345 scheduled flights, only 0.3% were cancelled.
Ticking up lately.
UA 5688 arrived on time 84% of the time over the last three months in the data, compared with 81% in the three months before that.
The breakdown
- Mon86%(51 flights)
- Tue89%(45 flights)
- Wed90%(50 flights)
- Thu74%(49 flights)
- Fri74%(50 flights)
- Sat77%(48 flights)
- Sun82%(51 flights)
- 9 AM–12 PM62%(21 flights)
- 12–3 PM—(3 flights)
- 6–9 PM83%(320 flights)
Jun 87% → May 70% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 87% | 30 |
| July 2025 | 84% | 31 |
| August 2025 | 81% | 31 |
| September 2025 | 92% | 24 |
| October 2025 | 67% | 27 |
| November 2025 | 76% | 29 |
| December 2025 | 80% | 30 |
| January 2026 | 84% | 31 |
| February 2026 | 79% | 28 |
| March 2026 | 93% | 30 |
| April 2026 | 89% | 26 |
| May 2026 | 70% | 27 |
- Departures on time
- 83%
- Diverted
- 0%
- Flights flown
- 344
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 345 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.