I have an active felony warrant and have to go back to Europe for work before I can get this taken care of.

Unless the authorities are following you, you shouldn't be arrested at the airport.  Neither the airlines nor TSA run criminal background checks before allowing you to fly, so no one at the airport will know of the outstanding warrant.  Of course, you could hire an attorney to represent you and that may help avoid additional charges such as being a fugitive for leaving the US with an outstanding warrant.