There's certainly much less availability on those dates than in November... If you stick with a redemption on AA you're not going to find anything much better than you already have (although I still don't understand the 110 EUR).

If paying cash really isn't an option, do you have 50,000 UA miles? Or something that can be converted to 50,000 UA miles (e.g. Chase UR points)?? Or a friend with 50,000 UA miles??? UA has 25,000-mile business class rdemption availability on several direct flights on your dates.