Every month, Lufthansa’s (and several other airlines’) Frequent Flyer programme, Miles & More, publishes ‘Mileage bargains’ for which you can book award flights for around half of the cost. The deals for the month are usually published on the 1st of each month and you must book within the month for the reduced mileage to qualify.
For example, you can fly Economy class to Aberdeen from several U.S. cities for just 30.000 miles round trip (instead of 60.000) or 55.000 miles round trip (instead of 105.000) for Business Class. The deals are mostly for flights to Europe.
In this case, travel must be booked any day of December and you must travel between 7 April and 30 April of 2015. The dates are in European format (DD.MM.YYYY), so do not be confused by that.
In general, I was able to take advantage of some of the bargains before and found good availability on the bargains mentioned for this month. Bargains only apply to Economy and Business class but not First Class. Mileage bargains are awesome!