Best Time to Fly SLC to PHX: On-Time Stats by Hour & Airline
Salt Lake City International → Phoenix Sky Harbor International
Data through July 2026 · Last updated October 18, 2026
5,775 flights were scheduled from Salt Lake City (SLC) to Phoenix (PHX) in the last 12 months, and 83.9% of those that flew arrived on time, 6.3 points above the US average of 77.6%.
Delta Air Lines was the most punctual of the 6 airlines on the route at 88.0%, while Southwest Airlines trailed at 79.3%.
September has been the best month (89% on time) and Sunday the weakest day of the week (82%).
0.5% of flights were cancelled, versus 1.8% nationally.
SLC 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 |
|---|---|---|---|---|
| Delta Air Lines | 88.0% | 56 min | 0.5% | 1,709 |
| SkyWest Airlines | 85.8% | 119 min | 0.2% | 1,209 |
| Envoy Air | 85.7% | 36 min | 0.0% | 64 |
| American Airlines | 84.6% | 70 min | 0.4% | 235 |
| Frontier Airlines | 82.6% | 88 min | 1.4% | 697 |
| Southwest Airlines | 79.3% | 52 min | 0.4% | 1,861 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SLC to PHX
On-time arrival % by scheduled departure hour (local time), 11,671 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 96.7% | 0.0% | 210 |
| 6am–7am | 95.4% | 0.2% | 521 |
| 7am–8am | 90.9% | 0.8% | 832 |
| 8am–9am | 91.0% | 0.2% | 1,185 |
| 9am–10am | 94.3% | 1.1% | 355 |
| 10am–11am | 88.9% | 0.0% | 441 |
| 11am–12pm | 86.9% | 0.2% | 1,236 |
| 12pm–1pm | 89.9% | 0.4% | 1,044 |
| 1pm–2pm | 86.4% | 0.0% | 206 |
| 2pm–3pm | 76.2% | 0.5% | 372 |
| 3pm–4pm | 82.8% | 0.1% | 1,325 |
| 4pm–5pm | 76.9% | 0.9% | 324 |
| 5pm–6pm | 83.6% | 0.3% | 877 |
| 6pm–7pm | 69.3% | 0.3% | 634 |
| 7pm–8pm | 75.8% | 0.6% | 537 |
| 8pm–9pm | 66.9% | 1.0% | 303 |
| 9pm–10pm | 73.4% | 1.1% | 552 |
| 10pm–11pm | 81.0% | 0.7% | 613 |
| 11pm–12am | 82.7% | 0.0% | 104 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SLC 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) | 88.2% | +2.9 pts | 0.0% | 238 |
| Christmas & New Year (Dec 20 - Jan 3) | 83.0% | -2.3 pts | 0.6% | 539 |
| Summer peak (Jun 15 - Aug 15) | 79.8% | -5.5 pts | 0.8% | 1,780 |
| All other days | 85.3% | — | 0.3% | 9,114 |
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).