May 31, 2022 to June 2, 2022
Princeton University
US/Eastern timezone

Getting back to EWR

Unless you have TSA-precheck or other program to expedite the security line process, it is good to allow 2 hours in EWR or perhaps a bit more if you are checking a bag. (You can see estimated wait times here: https://www.tsawaittimes.com/security-wait-times/EWR/Newark-International)

Train schedule for Thursday/Friday https://www.njtransit.com/train-to?origin=Princeton%20Station&destination=EWR%20Newark%20Airport%20Station&date=06%2F02%2F2022

Depart Princeton at 12:50, 13:11, 13:46, 14:13, 14:47, 15:16, 15:38, 16:14, 16:38, 17:06, 17:30, 18:10, 18:33, 19:15, 19:58, etc.. 

Schedule for Saturday https://www.njtransit.com/train-to?origin=Princeton%20Station&destination=EWR%20Newark%20Airport%20Station&date=06%2F04%2F2022

As you saw coming, the train takes about 1 hour (+/- 5 minutes) plus the time for the airport train to the terminal itself. Taking an über to the Princeton Junction station can save the walk to the train station

An Uber all the way the airport is likely $80 (or $100 for a large car) - can be a cost effective solution in groups.. Time via car is also about 1 hour. (+traffic..) 

Find out your train status here https://www.njtransit.com/dv-to/Princeton%20Junction%20Station