ATL to MKE flight delays & on-time performance
Nonstop flights from Hartsfield Jackson Atlanta International Airport to General Mitchell International Airport · 669 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ATL or MKE right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Atlanta (ATL) to Milwaukee (MKE) arrived on time 82% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1.9% were cancelled, and 5% arrived an hour or more late.
- Departures scheduled around 8am did best (90% on time); around 6pm did worst (71%).
- Saturday was the most reliable day to fly (87% on time) and Monday the least (77%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (48%).
Which airline is most on time from ATL to MKE?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 83% | 2.0% | 10 min | 4.4% | 2,202 |
| Frontier Airlines | 52% | 0.0% | 21 min | 13.1% | 62 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am90%368 flights
- 9am80%57 flights
- 10am86%288 flights
- 12pm87%179 flights
- 1pm88%137 flights
- 2pm85%115 flights
- 3pm86%158 flights
- 4pm76%212 flights
- 6pm71%74 flights
- 7pm71%285 flights
- 10pm79%309 flights
- 11pm80%52 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday77%3.1% cancelled
- Tuesday85%0.3% cancelled
- Wednesday87%0.0% cancelled
- Thursday83%0.0% cancelled
- Friday80%1.9% cancelled
- Saturday87%3.7% cancelled
- Sunday79%4.3% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)48%
- Late-arriving aircraft28%
- Air traffic control & airport congestion19%
- Extreme weather6%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)82%
- Extreme weather18%
- Air traffic control & airport congestion0%
- Security0%
ATL to MKE: common questions
- How often are ATL to MKE flights on time?
- 82% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Atlanta to Milwaukee cancelled?
- 1.9% of scheduled flights were cancelled (44 of 2,264).
- How long are typical delays?
- Across all flights the average arrival delay was 10 min (early arrivals count as zero). Flights that were late arrived 52 min behind schedule on average, and 4.7% of flights were an hour or more late.
- How long is taxi time at ATL?
- Flights on this route spent 16 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MKE to ATL — 89% on time
More flights from Atlanta
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ATL → MKE, nonstop flights by US airlines that report to the DOT. How we calculate this.