I’m really interested now, because I know one problem with the early 707 was that it was a bit pushed for range when flying the Atlantic east to west, against the prevailing winds.
Hm…. a certain amount of Googling shows this was the case, but later versions of the 707 had a range of 4,000 miles, and eventually 6,000 miles with turbofans.
VC10 range was 5,850, according to Wiki. Assuming that’s the Super version.