Currently United has a surprise award ticket sale at 50k miles to several European countries, but only limited to travel between now and to end of March.
It is just an ok deal, given Jan-March is usually the low traveling season for any European countries, and low-cost carriers like TAP or SAS constantly can be booked for under $400 RT, and if you book with Chase points at 1 point = 1.25/1.5 cents, you can easily fly to Europe for under $300 RT.