If you’re looking for public transportation between JFK Airport and Newark airport, there is no direct service other than taxi or car service. Prices for a taxi will be around $100+ tip and if you think Uber will fare any better, think again, see the prices below:
If you are on limited time to catch the connecting flight, then taxi or car service are your only choices. Remember, while it’s only about 33 miles between both airports, you are traveling between 2 states and through NYC & NJ traffic.
If you have at least 3 hrs of travel time between the airports (not counting the time you should be at the airport before flight departure) and you’re looking for an economical option, then for just $29, the NYC Express Bus is for YOU!
While its not direct (it requires a bus transfer in Manhattan between NYC Airporter and the Newark Airport Express Bus) both buses can take you to or from JFK and Newark Liberty airport. Click the link for more info.