Milwaukee (MKE) to Atlanta (ATL): On-Time Performance
Data through July 2026
Milwaukee (MKE) to Atlanta (ATL) effectively runs on two schedules. In October 2024, 96% of arrivals were on time; in July 2024 that fell to 77% — a 19-point seasonal swing. Across the full period the route averages 88% on-time against a national 78%. Morning departures also hold up better than evening ones (91% vs 83%), which matters most in the rough months.
- On-time
- 88%
- arrived <15 min late
- Avg delay
- 11 min
- completed flights
- Cancelled
- 1.7%
- Flights/day
- 6.2
- last 12 months
- Duration
- 2h 6m
- scheduled
- Distance
- 669 mi
Best airline from MKE to ATL
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlinesmost reliable | 92% | 4 min | 0.7% | 280 |
| Delta Air Lines | 88% | 11 min | 1.7% | 4,533 |
| Frontier Airlines | 67% | 20 min | 1.6% | 62 |
Monthly on-time trend
Best time to fly from MKE to ATL
Aim for departures around 6 a.m. (94% on-time); avoid 6 p.m. departures (81%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 88% | 10 min |
| Tuesdaybest | 91% | 5 min |
| Wednesday | 91% | 8 min |
| Thursday | 90% | 8 min |
| Friday | 88% | 9 min |
| Saturday | 87% | 18 min |
| Sunday | 82% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft30%
- Airline operations47%
- National airspace system16%
- Weather7%
Frequently asked questions
- How often are flights from MKE to ATL delayed?
- 12% of MKE–ATL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 11 minutes.
- Which airline is most reliable from MKE to ATL?
- Southwest Airlines has the best on-time record on this route at 92%, based on 280 flights. 3 airlines flew MKE–ATL frequently enough to compare in this period.
- What is the best time of day to fly from MKE to ATL?
- Departures around 6 a.m. have the best record (94% on-time), while departures around 6 p.m. have the worst (81%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MKE to ATL?
- The scheduled MKE–ATL flight time averages 2h 6m over 669 miles. Actual arrival times vary — flights on this route land 15+ minutes late 12% of the time.
- How often are MKE to ATL flights cancelled?
- 1.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from MKE to ATL?
- July 2024 was the roughest month in this dataset, with only 77% of arrivals on time. The best was October 2024 at 96%. If your dates are flexible, that 19-point gap is worth planning around.
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Based on 4,875 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.