Best Time to Fly PHX to ORD: On-Time Stats by Hour & Airline
Phoenix Sky Harbor International → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 76.2% of Phoenix (PHX) to Chicago (ORD) flights arrived on time (5,587 scheduled flights). That is 1.4 points below the national average of 77.6%.
American Airlines was the most punctual of the 4 airlines on the route at 78.5%, while Southwest Airlines trailed at 60.7%.
February has been the best month (87% on time) and Sunday the weakest day of the week (78%).
1.6% of flights were cancelled, versus 1.8% nationally.
PHX to ORD 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 |
|---|---|---|---|---|
| American Airlines | 78.5% | 75 min | 2.1% | 2,997 |
| United Airlines | 76.9% | 87 min | 0.8% | 1,967 |
| Frontier Airlines | 69.2% | 123 min | 4.1% | 195 |
| Southwest Airlines | 60.7% | 66 min | 1.2% | 428 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHX to ORD
On-time arrival % by scheduled departure hour (local time), 11,211 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | 87.0% | 1.8% | 439 |
| 1am–2am | 86.6% | 0.0% | 67 |
| 5am–6am | 93.3% | 1.3% | 526 |
| 6am–7am | 92.5% | 0.8% | 631 |
| 7am–8am | 89.9% | 0.5% | 928 |
| 8am–9am | 83.3% | 0.4% | 760 |
| 9am–10am | 80.0% | 0.2% | 580 |
| 10am–11am | 80.7% | 0.8% | 780 |
| 11am–12pm | 81.2% | 0.8% | 512 |
| 12pm–1pm | 78.5% | 0.7% | 1,037 |
| 1pm–2pm | 70.0% | 0.6% | 655 |
| 2pm–3pm | 68.0% | 1.3% | 457 |
| 3pm–4pm | 67.6% | 1.9% | 890 |
| 4pm–5pm | 74.7% | 1.2% | 749 |
| 5pm–6pm | 69.0% | 1.7% | 294 |
| 6pm–7pm | 78.2% | 0.6% | 515 |
| 7pm–8pm | 72.6% | 3.4% | 614 |
| 8pm–9pm | 75.9% | 2.8% | 145 |
| 9pm–10pm | Limited data | 3 | |
| 10pm–11pm | Limited data | 8 | |
| 11pm–12am | 86.6% | 1.3% | 621 |
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 ORD
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) | 75.5% | -5.6 pts | 5.5% | 199 |
| Christmas & New Year (Dec 20 - Jan 3) | 84.8% | +3.7 pts | 0.2% | 509 |
| Summer peak (Jun 15 - Aug 15) | 71.8% | -9.3 pts | 1.8% | 1,738 |
| All other days | 81.2% | — | 0.9% | 8,765 |
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).