ITF
I assume yr question is part of your project. At risk of "grannies & eggs" remember that the A320 would have different routings across the Atlantic as I believe it is not certified for ETOPS. Consequently the "Blue Spruce" routes would be used. (Page 3 and Chapter 11 in Nth Atl MNPSA Ops Manual refers.)
No doubt you will know (like 95% of Ppruners) that ETOPS is the acronym for Engines Turning Or Passengers Swimming!
Have a good Easter