Flight
NYC has tons of airports, but Laguardia is definitely the easiest/closest for domestic flights and is only a short cab ride to and from the city. Additionally - you can choose to route out your trip via the MTA!
Flight
Another popular airport is JFK. A bit further into Queens, JFK is larger and may have more flights coming in and out for your convenience. Cab ride fares are fixed via yellow cabs or feel free to route your trip with the MTA
Train
If you're coming from the NYC area, the closest train is the G train. We highly suggest taking the G train to the Smith - 9 Sts stop and calling an uber from there. Alternatively - you can walk about 15 minutes or take the B61 bus and walk 5 minutes.