Delta flights

When you say origination flight do you mean it is the same airline and your luggage will be checked through from the original flight? If so, and you can get boarding passes for both flights in the origination airport you will be fine. If you are changing airlines (and switching buildings at JFK) and you will need to recheck luggage, get a boarding pass and go through security again I would not be comfortable with this amount of time even given that most transatlantic flights depart late.

We would be flying Delta all the way through. Sorry for the ambiguities. Oops spelling...?

I have had very good luck with Delta to/from Europe. Always on-time. Coming from Venice, are you sure you are on Delta and not a partner airline?

song is involved getting to JFK but no, it seems it is Delta from the reservations site.

I would call Delta and double check about both. Flights on partner airlines are issued on Delta tickets/under Delta name and with Delta flight numbers. But what terminal you will arrive at/depart from is determined by what equipment is being used. For example a couple of years ago we flew Delta to Paris - Delta tickets, Delta flight numbers etc. And the flight from NY to Paris was on a Delta plane out of Delta (terminal 3). But the flight Paris to NY was actually on Air France equipment (although with mixed AF/Delta cabin crew) and it landed at the International Arrivals building (terminal1) rather than Delta. Which could be an issue if you're then flying out of Terminal 3 with limited time between flights.

Delta schedules flights expecting that time is sufficient to make connections. Unforseen events often upset these plans. We have made a west bound connection with less than 60 minutes at JFK. Flexibilty and agility are hallmarks of an experienced traveller. Always have good reading material in reserve.