Best Time to Fly PHX to ATL: On-Time Stats by Hour & Airline
Phoenix Sky Harbor International → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 81.5% of Phoenix (PHX) to Atlanta (ATL) flights arrived on time (3,734 scheduled flights). That is 3.8 points above the national average of 77.6%.
Among 4 airlines, Delta Air Lines led with 86.3% on time and Frontier Airlines was last with 71.4%.
Over 24 months, Wednesday was the most reliable day (86% on time) and July the worst month (76%).
The cancellation rate was 0.8% (US average 1.8%).
PHX to ATL 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 | 86.3% | 100 min | 1.0% | 2,294 |
| Southwest Airlines | 75.5% | 42 min | 0.2% | 601 |
| American Airlines | 72.7% | 66 min | 0.5% | 614 |
| Frontier Airlines | 71.4% | 72 min | 1.8% | 225 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHX to ATL
On-time arrival % by scheduled departure hour (local time), 7,444 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 4 | |
| 1am–2am | Limited data | 1 | |
| 5am–6am | 94.2% | 0.7% | 138 |
| 6am–7am | 93.7% | 1.6% | 743 |
| 7am–8am | 89.8% | 0.8% | 823 |
| 8am–9am | 84.4% | 0.2% | 446 |
| 9am–10am | 75.5% | 0.5% | 425 |
| 10am–11am | 84.2% | 0.3% | 644 |
| 11am–12pm | 83.7% | 0.3% | 326 |
| 12pm–1pm | 81.3% | 0.0% | 315 |
| 1pm–2pm | 79.9% | 0.3% | 622 |
| 2pm–3pm | 80.5% | 0.9% | 316 |
| 3pm–4pm | 76.8% | 0.8% | 658 |
| 4pm–5pm | 76.2% | 0.6% | 508 |
| 5pm–6pm | 65.2% | 1.5% | 67 |
| 6pm–7pm | 67.6% | 0.0% | 37 |
| 7pm–8pm | 67.6% | 0.0% | 37 |
| 8pm–9pm | Limited data | 15 | |
| 9pm–10pm | Limited data | 3 | |
| 10pm–11pm | 85.4% | 1.6% | 245 |
| 11pm–12am | 83.6% | 0.8% | 1,071 |
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 ATL
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) | 82.8% | -1.5 pts | 0.0% | 151 |
| Christmas & New Year (Dec 20 - Jan 3) | 82.2% | -2.1 pts | 0.3% | 326 |
| Summer peak (Jun 15 - Aug 15) | 78.1% | -6.2 pts | 0.9% | 1,214 |
| All other days | 84.2% | — | 0.7% | 5,753 |
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).