Best Time to Fly MKE to ATL: On-Time Stats by Hour & Airline
General Mitchell International → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
2,264 flights were scheduled from Milwaukee (MKE) to Atlanta (ATL) in the last 12 months, and 88.5% of those that flew arrived on time, 10.9 points above the US average of 77.6%.
Among 2 airlines, Delta Air Lines led with 89.2% on time and Frontier Airlines was last with 67.2%.
Over 24 months, Tuesday was the most reliable day (92% on time) and December the worst month (81%).
The cancellation rate was 2.0% (US average 1.8%).
MKE 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 | 89.2% | 94 min | 2.0% | 2,202 |
| Frontier Airlines | 67.2% | 55 min | 1.6% | 62 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MKE to ATL
On-time arrival % by scheduled departure hour (local time), 4,648 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 90.9% | 1.8% | 605 |
| 6am–7am | 94.5% | 1.5% | 404 |
| 7am–8am | 89.9% | 1.3% | 634 |
| 8am–9am | Limited data | 14 | |
| 9am–10am | Limited data | 12 | |
| 10am–11am | 92.2% | 1.9% | 697 |
| 11am–12pm | 88.0% | 1.8% | 110 |
| 12pm–1pm | 90.1% | 1.2% | 559 |
| 1pm–2pm | 86.0% | 0.0% | 57 |
| 2pm–3pm | 89.6% | 0.6% | 321 |
| 3pm–4pm | 82.6% | 1.7% | 292 |
| 4pm–5pm | 83.7% | 0.8% | 267 |
| 5pm–6pm | 86.5% | 1.6% | 256 |
| 6pm–7pm | 81.7% | 1.9% | 413 |
| 7pm–8pm | Limited data | 7 | |
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 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) | 75.0% | -14.9 pts | 0.0% | 90 |
| Christmas & New Year (Dec 20 - Jan 3) | 80.7% | -9.2 pts | 1.8% | 170 |
| Summer peak (Jun 15 - Aug 15) | 87.9% | -2.0 pts | 1.8% | 815 |
| All other days | 89.9% | — | 1.4% | 3,573 |
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).