Luisa, I will be very interested in how your arrangements work. Mine were just about perfect. Of course, flying from Boston I expect a direct flight to Europe even if I have changes there.
Next month, I have an appointment for a telephone conversation with someone from GCT's air travel department about my trip next June to England, Scotland and Wales. It's so far ahead, I don't think anything they say now will be accurate for next year. And when I go into BA's website, they aren't listing flights more than 355 days ahead. But by then, I think there will be fewer days, and I can have done my own research.
One thing is definite, though. No Delta flights!