Which airline is most reliable for ATL (Atlanta) to MKE (Milwaukee)?

The most reliable airline on the ATL to MKE route is Southwest Airlines, with an on-time arrival rate of 89%.

How often are flights delayed from ATL to MKE?

About 17% of flights from ATL to MKE experience delays. 83% arrive on time.

What's the average delay on ATL to MKE flights?

When flights from ATL to MKE are delayed, the average delay is approximately 51 minutes.

Is a short connection safe after a ATL to MKE flight?

With 83% of ATL to MKE flights arriving on time and an average delay of 51 minutes when late, a connection under 60 minutes at MKE is risky. We recommend at least 75-90 minutes for domestic connections after this route.

ATL → MKE

ATL (Atlanta) to MKE (Milwaukee)

ATL (Atlanta) to MKE (Milwaukee) flights arrive on time 83% of the time. The most reliable airline on this route is Southwest Airlines at 89%. The average delay is 51 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated August 2026.

ATL → MKE on-time performance by month

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This route is on time most of the time. About 83% of flights arrive on schedule.

Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Accurate?

Southwest Airlines is significantly more reliable on this route at 89% on time vs Frontier Airlines at 47%.

Airline Comparison

Southwest Airlines leads at 89% on time; Frontier Airlines trails at 47%.

Accurate?

Good to know

Departing from ATL

80% on time

Expect ~17 min sitting on the taxiway after your gate pushes back. ATL has long runway queues.

TSA is currently ~12 min. Best time: 4 AM (about 5 min).

More about ATL →

Arriving at MKE

79% on time

When flights into MKE are late, the average delay is 75 minutes. Build buffer if you have ground plans.

If connecting at MKE: TSA is ~28 min right now. Allow at least 60 minutes for a domestic connection.

More about MKE →Connection times at MKE →

Flight cancelled or delayed?

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ATL Airport MKE Airport

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Data last updated August 2026. Source: Bureau of Transportation Statistics.