The Yankee Air Museum in Belleville, Michigan is easy to find since it is located at Willow Run Airport.  This museum is so small and has very limited display of aircraft fleet.

If you are traveling just to see this museum alone, it may not be worth the time.  There are more that you could see for free if you visit the National Museum of the United States Air Force in Dayton, Ohio, instead.

Hours.

Tuesday – Saturday 10:00 AM – 4:00 PM
Sunday 11:00 – 4:00 PM

The museum is sometimes closed for private events.  Check the website first if you intend to visit.

Address.

47884 D St, Belleville, MI 48111
For GPS directions, see this link to Google Map.

Entrance Fees.

The museum collects $12 for adults and $8 for children in order to enter.  I think this is a little expensive as an entrance fee for a museum that has limited aircraft display.