https://www.google.com/flights/?&gl=us#flt=PHL./m/06flg.2017-11-27.PHLJFK0DL678~JFKKEF0DL446*/m/06flg.PHL.2017-12-03.KEFJFK0DL246~JFKPHL0DL434;c:USD;e:1;sd:1;t:f;sp:.USD.22816*.USD.22816
When you say USthat implies NY
Google flights keeps jumping to $665 after clicking flights.