If you book any flight only then you pay upfront, only option is to book flydrive then pay a deposit, FChoice is £65pp. Downside to this is very poor luggage allowance and fly to Sanford(some prefer, we hate).
We would rather fly indirect with scheduled than direct with a charter, even when DS was little.
I dont know how FC works but Virgin flydrive can be as cheap as flight only if you dont pay for or pick up their car, book it elsewhere.