Flight Reliability
UA 5670 · United Airlines
San Francisco → MRY (SFO–MRY)88% of its flights flew this route. The rest (ORD–CMH, OMA–DEN) are included in these numbers.
- 76%
- Arrive within 15 minutes
- 29 min
- Average arrival delay
- 1.2%
- Cancelled
- 5 min early
- Median arrival delay
Based on 321 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
UA 5670 departing between 9 PM–12 AM arrived on time 80% of the time, versus 62% between 6–9 PM.
Sunday scaries are real for this one.
UA 5670 arrived on time 97% of the time on Saturdays and just 67% on Sundays. That gap is worth planning around.
Recent months have been rougher.
UA 5670 arrived on time 74% of the time over the last three months in the data, compared with 91% in the three months before that.
The breakdown
- Mon79%(52 flights)
- Tue87%(37 flights)
- Wed73%(45 flights)
- Thu69%(51 flights)
- Fri72%(46 flights)
- Sat97%(34 flights)
- Sun67%(49 flights)
- 3–6 AM77%(13 flights)
- 12–3 PM78%(18 flights)
- 6–9 PM62%(61 flights)
- 9 PM–12 AM80%(222 flights)
Jun 69% → May 55% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 69% | 29 |
| July 2025 | 76% | 29 |
| August 2025 | 69% | 26 |
| September 2025 | 65% | 23 |
| October 2025 | 73% | 30 |
| November 2025 | 79% | 29 |
| December 2025 | 92% | 24 |
| January 2026 | 86% | 29 |
| February 2026 | 95% | 20 |
| March 2026 | 83% | 23 |
| April 2026 | 86% | 21 |
| May 2026 | 55% | 31 |
- Departures on time
- 73%
- Diverted
- 0.9%
- Flights flown
- 314
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 321 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.