flight from Ocho Rios to negril

There is no major airport in Negril

take the Knutsford Express from the Jerk centre in Ocho Rios to Montego Bay and then use Clives Transport from Mobay to Negril for about US 25 Clive will pick up from the Knutsford terminus

You can fly from Negril to Ochi (Boscobel, actually). You will need to change planes in MoBay and I am not sure of the schedule, and it isn't cheap.

You can also just charter a plane to take you directly from Negril to Ochi - faster, more $$$.

The Negril Aerodome cannot land planes at night, no lights. Not sure of the deal in Ochi, that airport just recently reopened.

Here's one company I know of that does it: http://www.timair.net/

Yes it is called the "Crazy Jamaican Fast Taxi Driver"
Much more exciting then an actual plane ride !!
ONE LOVE !!
Mike