Best Time to Fly PHX to SLC: On-Time Stats by Hour & Airline
Phoenix Sky Harbor International → Salt Lake City International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 83.0% of Phoenix (PHX) to Salt Lake City (SLC) flights arrived on time (5,773 scheduled flights). That is 5.4 points above the national average of 77.6%.
Delta Air Lines was the most punctual of the 6 airlines on the route at 90.2%, while Southwest Airlines trailed at 75.4%.
September has been the best month (87% on time) and Sunday the weakest day of the week (81%).
0.5% of flights were cancelled, versus 1.8% nationally.
PHX to SLC 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 | 90.2% | 79 min | 0.6% | 1,709 |
| Envoy Air | 89.1% | 42 min | 0.0% | 64 |
| American Airlines | 88.0% | 73 min | 0.4% | 235 |
| Frontier Airlines | 84.8% | 70 min | 1.4% | 697 |
| SkyWest Airlines | 82.4% | 68 min | 0.2% | 1,209 |
| Southwest Airlines | 75.4% | 49 min | 0.3% | 1,859 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHX to SLC
On-time arrival % by scheduled departure hour (local time), 11,667 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 3 | |
| 5am–6am | Limited data | 19 | |
| 6am–7am | 96.3% | 0.6% | 950 |
| 7am–8am | 95.4% | 0.0% | 565 |
| 8am–9am | 88.9% | 0.0% | 1,006 |
| 9am–10am | 91.5% | 0.5% | 889 |
| 10am–11am | 89.9% | 0.7% | 599 |
| 11am–12pm | 84.0% | 0.4% | 535 |
| 12pm–1pm | 87.7% | 0.8% | 376 |
| 1pm–2pm | 87.1% | 0.3% | 1,116 |
| 2pm–3pm | 83.3% | 0.6% | 728 |
| 3pm–4pm | 78.5% | 0.1% | 775 |
| 4pm–5pm | 76.6% | 1.1% | 449 |
| 5pm–6pm | 78.6% | 0.3% | 1,065 |
| 6pm–7pm | 78.4% | 0.3% | 771 |
| 7pm–8pm | 81.0% | 0.2% | 618 |
| 8pm–9pm | 73.3% | 0.2% | 575 |
| 9pm–10pm | 67.5% | 0.0% | 440 |
| 10pm–11pm | 62.8% | 1.6% | 183 |
| 11pm–12am | Limited data | 5 | |
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 SLC
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) | 82.7% | -2.2 pts | 0.4% | 238 |
| Christmas & New Year (Dec 20 - Jan 3) | 81.6% | -3.4 pts | 0.4% | 540 |
| Summer peak (Jun 15 - Aug 15) | 80.7% | -4.3 pts | 0.8% | 1,780 |
| All other days | 85.0% | — | 0.3% | 9,109 |
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).