I would think RevMan would be more than happy if you cancelled the unwanted flights because even if you don't need to go, there's still a chance that fans of one of the other British clubs in the last 16 will have to - giving them every opportunity to hike all the fares both ways and sell your seats at a much higher price.

I hope for your sake, assuming you've not yet seen a game there, that you get Milan. I had the good fortune to be able to watch my own team, Norwich City, play Inter there in the UEFA Cup over 30 years ago. It might be crumbling now, whereas somewhere like Benfica certainly isn't, but it remains one of the most iconic stadia in the world. Watching my own club play there is one of the major highlights of my supporting life, and it's a memory I'll forever cherish. For us, it turned into a once-in-a-lifetime opportunity - I sense you'll get a lot more!