From what I read, one-way fares between Miami and Orlando will start at $79 for SMART service, and $149 for PREMIUM service. SMART fare bundles for families of four will be available for less than $199 one way. Travelers can expect to travel from Orlando to Miami on a nonstop Brightline train in two hours and 59 minutes, and from Orlando to West Palm Beach in two hours.
It seems that taking Amtrak only costs $39 but it takes 5+ to 7+ hours, depending on which Silver and, currently, each train only runs once a day ... 8:10AM and 11:50AM north - 1:19PM and 10:47PM south
Maybe the cost difference will keep enough people riding Amtrak that Brightline will reduce their individual fares. Their "SMART family bundle" works out to only an extra $10 per person - but it is a $43 difference for a family of 4.