Answered by The Penny Pincher
I have good news and bad news for you. You can use your Midwest Miles to book an award ticket on American Airlines for international travel. The bad news is that you can not combine your American and Midwest miles.
A suggestion you might consider is to purchase one of the inexpensive airfares to Europe (fares are currently running in the $299 to $500 range), and then use your miles for an upgrade to a comfortable seat in business class or first class.
All the best.