Flight
The Portland airport is only 15 minutes from the waterfront. There are multiple airlines with direct flights from Washington DC and New York.
Travel Note
Portland is less than two hours from Boston and approximately 5.5 hours from New York City.
Travel Note
Cabs, Ubers and Lyfts are all plentiful in Portland. You can also rent a car from the airport -- but unless you are going on a daytrip outside of Portland, it isn't necessary.
House Or Rental
There are many hotels and Airbnb rentals in downtown Portland on or near Commercial Street that close to the ferry and the venue. This link goes to a map with the reception and ferry sites marked, as well as links to many nearby hotels. We also recommend Airbnb's, as there are many in Portland. https://bit.ly/3zFRvAA