You will fly into Lisbon airport (LIS). There are direct flights from JFK to LIS. Delta and TAP Portugal operate these flights. They are usually late night flights and arrive in Portugal the following morning (with the time difference).
You can grab Ubers from the airport. This is our recommended way to travel around if you are not renting a car. If you are renting a car, you can pick up your car right in the terminal! The wedding hotel is about half an hour from the airport.
It would be best to arrive July 3rd and depart July 11th. There will be events planned throughout the week, including the welcome party on the 5th of July. In light of Independence Day and weekends that would be the best schedule to minimize time off of work.
The wedding venue is approximately half way between Cascais and Lisbon, which is around 20 minutes, making it approximately 40 minutes from Cascais to Lisbon. Don't worry, we will be providing transportation to the wedding from our hotel. Details will be provided in the invite and also more information on the website once it is available