Lufthansa is running a ticket sale to Munich from Boston during Thanksgiving weekend for $589. You can book this ticket directly from lufthansa.com. Since this is a discount deal, the deal may not last long so book your ticket soon if you are planning to take a trip to Germany during Thanksgiving Weekend.
Sample fare from Boston (BOS) to Munich (MUC) from lufthansa.com
Since this is a discounted ticket, you will get only 25% of the miles flown as the mileage credit. You can check the first baggage for free and the second checked-in baggage will cost you $100 each way.
You can get the same discount deal on United.com
Use your travel bonus category card like American Express Gold Premier (3x) / Chase Sapphire (2x) to earn additional points on your airline ticket price.