$99 Cheap Southwest Airlines flights Atlanta (ATL) to Milwaukee (MKE)

Make use of the "Price (lowest to highest)" filter on Expedia to find cheap Southwest Airlines return flights from $192 from ATL to MKE. Affordable one-way fares from $99 are available too.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Begin your search one to three months ahead of your departure date to get cheap fares on Southwest Airlines flights from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to General Mitchell Intl. Airport (MKE). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Nail your timing, and you can enjoy significant savings on domestic journeys.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.

The earliest Southwest Airlines flight from ATL to MKE takes off at 8:40AM UTC-5, touching down at 9:45AM UTC-6. If you prefer to head off later in the day, the last Southwest Airlines flight leaves ATL at 8:30PM UTC-5 and touches down at MKE at 9:30PM UTC-6. Flying before noon is generally a smart choice as morning and mid-morning flights tend to experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.