Air travel help, tricky
 

can anyone help me plan a May trip from Florida (PBI) to Bermuda to Long Island and back to Florida.? 2 weeks. Thanks. Kay

Doubt you can find any "direct" flights to Long Island from PBI. Best option would probably be to make your way to FLL or MIA then take either Bahamas Air or Southern Air Charter (don't let the word "Charter" confuse you they have some scheduled flights) to Long Island.

Could you fly from LGA or JFK rather than Long Island?
Sites like Expedia allow you to configure a multi leg trip. Then you can buy the tickets directly from the airlines.

I thought OP was asking about Long Island in the Bahamas.

If Long Island, New York then best routing would probably be PBI to Miami to Bermuda to JFK then from one of the NYC area airports (JFK, LGA or EWR to PBI.

Regardless of which Long Island try using the Multi-leg booking option (as suggested by Abramon this website: Matrix - ITA Software by Google

Thanks to all above for help, still working on routes and fares. K.