GAW – It will take hours your way.
The way I’d do it is like this and it probably would be quicker than a shuttle -depends on traffic.
1. Take Airtrain to Jamaica LIRR station -$5.00.
2. LIRR to PENN Station, NY – Off Peak only -$6.25 @ ticket machine.
(If traveling on Sat. or Sun. buy a City Ticket for $3.75.)
3. Walk a block (above or underground) to 33rd St. Take PATH train to Newark Penn Station. -$2.25.
(Sorry GAW -price has gone up.)
4. Bus to Airport -$1.50.
Total possible cost: $15.00 🙂