Hello Alice and Iona,
Just made some research regarding the plane tickets and for instance, for next week tickets are cheaper than for the end of August. Not a huge difference, about 20$ or 30$.
As long as the trip is to be made during the week, it’s not so bad. May be worst during an weekend though.
At the moment I am flexible so if you have a certain schedule, I could probably adjust. But not sure how will be the end of August as the school starts earlier this year.
Let me know about your ideas regarding this.
All the best!