Round trip business class ticket from the US to Europe on Star Alliance when transferred to Singapore or Aeroplan. (travelcodex.com)
If you would like to use these miles for business class award ticket, you need another 35,000 miles (135,000 miles for round trip business class award ticket for Trans - Atlantic routes). (takeoffwithmiles.com)
United typically charges 115,000 miles for round trip business class awards from the US to Europe, so even if you value the hotel at $ 125 per night, you're getting $ 875 in hotel plus $ 2,500 (or more) in value if you can redeem for a business class round trip ticket. (travelandleisure.com)