Best Time to Fly SFO to PHX: On-Time Stats by Hour & Airline
San Francisco International → Phoenix Sky Harbor International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 73.9% of San Francisco (SFO) to Phoenix (PHX) flights arrived on time (4,690 scheduled flights). That is 3.7 points below the national average of 77.6%.
Among 5 airlines, SkyWest Airlines led with 86.7% on time and Southwest Airlines was last with 60.4%.
Over 24 months, Tuesday was the most reliable day (83% on time) and July the worst month (69%).
The cancellation rate was 0.8% (US average 1.8%).
SFO to PHX 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 |
|---|---|---|---|---|
| SkyWest Airlines | 86.7% | 75 min | 0.7% | 545 |
| United Airlines | 80.7% | 58 min | 0.4% | 1,473 |
| American Airlines | 74.6% | 100 min | 0.8% | 1,319 |
| Frontier Airlines | 61.6% | 100 min | 3.3% | 273 |
| Southwest Airlines | 60.4% | 57 min | 0.6% | 1,080 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SFO to PHX
On-time arrival % by scheduled departure hour (local time), 9,635 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 96.0% | 0.2% | 808 |
| 6am–7am | 93.8% | 0.4% | 488 |
| 7am–8am | 91.1% | 0.9% | 464 |
| 8am–9am | 88.2% | 0.4% | 494 |
| 9am–10am | 82.2% | 0.3% | 597 |
| 10am–11am | 64.3% | 0.2% | 511 |
| 11am–12pm | 72.4% | 0.3% | 659 |
| 12pm–1pm | 72.5% | 0.3% | 1,005 |
| 1pm–2pm | 65.9% | 0.8% | 358 |
| 2pm–3pm | 64.6% | 0.6% | 165 |
| 3pm–4pm | 67.4% | 0.8% | 662 |
| 4pm–5pm | 77.2% | 0.4% | 1,059 |
| 5pm–6pm | 60.2% | 0.0% | 161 |
| 6pm–7pm | 71.7% | 0.5% | 816 |
| 7pm–8pm | 79.3% | 0.7% | 607 |
| 8pm–9pm | 65.1% | 1.9% | 418 |
| 9pm–10pm | 75.3% | 1.0% | 299 |
| 10pm–11pm | 60.9% | 0.0% | 64 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SFO to PHX
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) | 78.2% | -0.6 pts | 0.5% | 203 |
| Christmas & New Year (Dec 20 - Jan 3) | 63.5% | -15.3 pts | 0.5% | 435 |
| Summer peak (Jun 15 - Aug 15) | 71.9% | -7.0 pts | 0.8% | 1,506 |
| All other days | 78.8% | — | 0.5% | 7,491 |
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).