Question : Is there another local airport that can get you to Milwaukee?
Answer : Departing from London Luton Airport is not the only way to get to General Mitchell International Airport. Try looking for flights from London Heathrow Airport (LHR) as well. Over the upcoming months, flights from LHR to MKE are being booked 68% cheaper than flights from LTN to MKE. Being only 29 miles away, it's easily accessible for most.
Question : How many days should you spend in Milwaukee?
Answer : The average time spent in Milwaukee by travelers from London is 29 days.