GRB to MKE, Green Bay–Austin Straubel International Airport to Milwaukee Mitchell International Airport Cheap Flights

Based on HopeGoo data, American Airlines offers one-way fares as low as US$146 on Cheapest nonstop routes (e.g. GRB to MKE on Tue, Apr 7), while United Airlines offers Cheapest nonstop round-trips from US$284 departing on Fri, Mar 6 and returning on Sat, Mar 7.

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Green Bay to Milwaukee is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

To find best deals on flights from Green Bay to Milwaukee, you can use various tools on HopeGoo: · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Apr 7, with one-way flights priced at just US$146. · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is American Airlines. · Set up price alerts to easily monitor ticket prices without having to check every day. · Check HopeGoo flight deals and promo codes frequently. · Avoid peak season unless you book very early. It seems the peak season for Milwaukee travel is around September. · Get exclusive promo codes for HopeGoo app users.

The cheapest months to fly from Green Bay to Milwaukee is October, when demand for travel is lower.

After crunching the numbers on our March flight calendar, it's currently cheapest to fly from Green Bay to Milwaukee on March 6, 2026 with United Airlines, with prices starting at US$284.

The time difference between Milwaukee and Green Bay is 0h.

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