Love is in the Airship's on 10% sale until October 6th, which is a nice little bonus if I do say so myself. Buy it now and become one of the first people to get 100% of the achievements so you can brag to all your friends about how you conquered Yuri Romance forever.
In addition to the Autumn Sale, Love is in the Airship is also featured in the Fall in Love Visual Novel Festival, running until October 1st. You can see a bunch of other Yuri games, Yaoi games, Bi games, and even purely Het romance games if you're truly daring. It's a wishlist-a-palooza for the average Steam VN fan.
Yuri Kissaten has two other games also featured, both of which are releasing in the next 6-7 months:
But there's plenty of other featured games I think you should check out too! Not all of these are Yuri, but all are worth a look: