That partnership has been dying a slow death for years. The best use of Alaska miles used to be for Emirates First Class awards, but those were massively devalued in 2016.
Earlier this year Alaska stopped being able to book those awards completely.
The last date to book Emirates economy or business class awards will be 7/31.
In August, Alaska will allow redemptions on fellow OneWorld carrier Qatar, which has one of the top rated business class products in QSuites.