Flight
The easiest airport to fly into would be JFK. From there, you can either hire a ride share service, or there's a direct shuttle to Jamaica train station to catch the Long Island Railroad to East Hampton. The closest airport is Macarthur (Islip), but it's a small airport so it may be difficult to find a flight.
Train
If you're coming from New York City, this is the easiest and cheapest option. There are multiple trains running per day on the LIRR from Penn Station to East Hampton. Another option if you're coming from New York City is the Hampton Jitney, which stops along Manhattan and goes out to East Hampton.
Hotel
This is where both the rehearsal dinner and the wedding will take place. Email your reservation inquiry to info@ehpresort.com and use the discount code above for 15% off. Other nearby hotel options include The Maidstone Hotel, Topping Rose House, and Baron's Cove. Airbnb also has tons of great stays available for all group sizes and tons of budget ranges.
Discount Code - KGAJ