The liverpool flights are all on a 757-200ER so will operate
LPL-JFK-LPL OR LPL-NOC-JFK-NOC-LPL
The Gla-Bos is on a 738 but having seats taken out so it can make it direct
So that will be GLA-BOS-GLA OR GLA-NOC-BOS-NOC-GLA
So no need for stops anywhere