Best Time to Fly MKE to PHX: On-Time Stats by Hour & Airline
General Mitchell International → Phoenix Sky Harbor International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 78.9% of Milwaukee (MKE) to Phoenix (PHX) flights arrived on time (1,453 scheduled flights). That is 1.3 points above the national average of 77.6%.
Southwest Airlines was the most punctual of the 2 airlines on the route at 79.3%, while American Airlines trailed at 78.5%.
October has been the best month (90% on time) and Thursday the weakest day of the week (79%).
0.9% of flights were cancelled, versus 1.8% nationally.
MKE 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 |
|---|---|---|---|---|
| Southwest Airlines | 79.3% | 54 min | 0.4% | 962 |
| American Airlines | 78.5% | 106 min | 1.9% | 487 |
| Frontier Airlines | Limited data | 4 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MKE to PHX
On-time arrival % by scheduled departure hour (local time), 2,957 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.1% | 0.7% | 412 |
| 6am–7am | 90.0% | 0.0% | 249 |
| 7am–8am | 84.0% | 0.9% | 529 |
| 8am–9am | Limited data | 29 | |
| 9am–10am | Limited data | 3 | |
| 10am–11am | 85.7% | 0.0% | 112 |
| 11am–12pm | 81.8% | 1.5% | 67 |
| 12pm–1pm | 78.3% | 0.0% | 130 |
| 1pm–2pm | 90.7% | 0.0% | 97 |
| 2pm–3pm | 81.1% | 0.0% | 351 |
| 3pm–4pm | Limited data | 5 | |
| 4pm–5pm | 82.6% | 0.0% | 115 |
| 5pm–6pm | 74.2% | 0.7% | 422 |
| 6pm–7pm | 69.3% | 0.0% | 137 |
| 7pm–8pm | 68.9% | 1.0% | 199 |
| 8pm–9pm | 69.5% | 3.5% | 85 |
| 9pm–10pm | Limited data | 14 | |
| 10pm–11pm | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MKE 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) | 81.0% | -2.0 pts | 4.9% | 61 |
| Christmas & New Year (Dec 20 - Jan 3) | 70.9% | -12.1 pts | 0.7% | 142 |
| Summer peak (Jun 15 - Aug 15) | 80.1% | -3.0 pts | 0.2% | 425 |
| All other days | 83.1% | — | 0.6% | 2,329 |
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).