It depends on the availability for the cheaper seats Wayne...so let me know what dates you are looking at going...April holidays or the June Holidays?
Pm me your dates and let me have a look at it for you...MBB Promo Price.
The indirect flights are normally cheaper as they have to "incentivise" people to take the flights over more direct flights.
From my professional experience is that Delta might be best as their tickets through to your final destination (your case Florida) might actually work out cheaper as if you were to buy tickets on Emirates to JFK and then get another ticket from JFK to Orlando or so.
Had a quick look and KLM has some CRAZY fares at the moment.
Under R4k for flights to Orlando excluding the taxes (airlines charge the taxes not the agents) subject to availability for your dates.
It is a ridiculous promo so let me know asap what the dates are.