As BA have their own terminal at JFK, perhaps the A318 will have their idle time waiting on the JFK ramp. Just fly into LCY, and have minimal ground time there. There is a discussion of another thread that according to an internal BA memo, GLA will be the fuel stop location? if thats the case i wonder if you would be able to fly GLA-JFK from GLA. also that being a BA airbus maintenence base , is another advantage for GLA. Saying that the allure of preclearing immigration at SNN is a positive advantage.