Can 2 puppies share a crate flying from usa to uk? this time im not asking of myself,after a series bad luck i have put getting another show pup on hold but my friend is getting a pup from the states and her sister is very keen to buy the litter mate.

You can if they are under a certain size and weight, check the airline rules.

Does that reflect on the total cost or is the cost the same regardless whether they are together or seperate?

I would have thought it more expensive to have 2 crates as you are paying for a space within the hold