Thanks KARFA, I’d assumed some logic there and hard boundaries, but EDI-FLR is 1058 miles, just nine miles closer than Helsinki and only offer some 40 TP so I was starting to wonder how random it was. It’s a bit of a shame as I was starting to write some code to screen scrape routes on ITA Matrix, calculate the Tier Points and then suggest the routes and dates that’ should give the most TP for the least money. I would have to start with a lookup table rather than just a straight calculation then.