so, how much is the ticket for your dates if you buy it outright on the days you need to travel, vs. if you were to book sale dates both ways?
i guess what i'm getting at is, if you're only saving around $100 why jump through all the hoops?
i know it doesn't answer your question, per se, but i'm just trying to put all the work your doing into perspective based on how much you're going to save if you could find a way around this ...