Best Time to Fly PHX to SFO: On-Time Stats by Hour & Airline
Phoenix Sky Harbor International → San Francisco International
Data through July 2026 · Last updated October 18, 2026
4,692 flights were scheduled from Phoenix (PHX) to San Francisco (SFO) in the last 12 months, and 65.8% of those that flew arrived on time, 11.9 points below the US average of 77.6%.
United Airlines was the most punctual of the 5 airlines on the route at 70.4%, while Southwest Airlines trailed at 60.1%.
January has been the best month (84% on time) and Monday the weakest day of the week (67%).
0.6% of flights were cancelled, versus 1.8% nationally.
PHX to SFO on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 70.4% | 61 min | 0.5% | 1,475 |
| Frontier Airlines | 68.9% | 67 min | 1.1% | 273 |
| SkyWest Airlines | 67.0% | 66 min | 0.2% | 545 |
| American Airlines | 64.1% | 77 min | 0.9% | 1,318 |
| Southwest Airlines | 60.1% | 57 min | 0.4% | 1,080 |
| Envoy Air | Limited data | 1 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHX to SFO
On-time arrival % by scheduled departure hour (local time), 9,642 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 99.2% | 0.0% | 132 |
| 6am–7am | 96.6% | 1.0% | 295 |
| 7am–8am | 72.1% | 0.1% | 1,049 |
| 8am–9am | 78.0% | 0.4% | 806 |
| 9am–10am | 65.7% | 0.2% | 412 |
| 10am–11am | 74.3% | 0.0% | 986 |
| 11am–12pm | 73.2% | 0.9% | 679 |
| 12pm–1pm | 73.3% | 1.0% | 102 |
| 1pm–2pm | 67.4% | 0.5% | 420 |
| 2pm–3pm | 68.2% | 0.7% | 583 |
| 3pm–4pm | 81.5% | 0.7% | 566 |
| 4pm–5pm | 73.4% | 0.1% | 701 |
| 5pm–6pm | 69.8% | 0.3% | 703 |
| 6pm–7pm | 71.8% | 0.9% | 344 |
| 7pm–8pm | 62.4% | 0.4% | 543 |
| 8pm–9pm | 68.1% | 0.1% | 662 |
| 9pm–10pm | 63.5% | 1.3% | 386 |
| 10pm–11pm | 56.8% | 1.1% | 267 |
| 11pm–12am | Limited data | 6 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PHX to SFO
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 85.0% | +9.9 pts | 0.5% | 202 |
| Christmas & New Year (Dec 20 - Jan 3) | 63.3% | -11.8 pts | 0.9% | 437 |
| Summer peak (Jun 15 - Aug 15) | 58.6% | -16.5 pts | 0.4% | 1,506 |
| All other days | 75.1% | — | 0.4% | 7,497 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).