I think it does stop in Jamaica going one way. As for Hicksville and Woodside, many trains on the Montauk Branch don't stop at those stations. Some trains don't even go through Hicksville.
From the LIRR bulletin.
The Cannonball East departs Penn Station on Fridays at 4:06 p.m. from Penn Station - May 27th through September 2nd and travels non-stop to Westhampton in 95 minutes, also stopping at Southampton, Bridgehampton, East Hampton and Montauk. For the July 4th holiday weekend, the Cannonball East departs on Friday July 1. Hamptons Reserve seating is $49.25 one-way. The remaining cars are filled on a first come, first-served basis priced at the regular one-way peak fare of $28.25
Even if I shave the trip to 100 miles to WestHampton in 95, that is pretty fast for LIRR. Wouldn't bet on it being on time too often.....It is unique in that it doesn't stop in any of the places like Woodside or Jamaica or Hicksville.....
Edited by brianpmcdonnell17, 15 April 2018 - 06:06 PM.