Viking Sky Sails from Boston

Flynn Cruiseport Boston will see more turnarounds as traffic grows, from 59 homeport calls last year to 64 this year and 67 next year.

"We are seeing more Canada/New England sailings and more sailings going south," said Michael Vanderbeeke, deputy port director, business development.

The big question mark will be when conflicts start happening, and the port authority has its eye on turning Terminal 1 into a multi-story turnaround facility should there be enough demand.

"We have a master plan and as business begins to grow, the question is at what point do we pull the trigger on additional capital investments. We are content to handle ports of call in our current infrastructure, but if we start to get 75-plus turnarounds in a season, that will be sufficient to invest," Vanderbeeke said. "There will be a decision point in 2019 or 2020 or 2022 that might be the year we need to bring additional capability on."

Carnival Cruise Line, Norwegian Cruise Line and Royal Caribbean International are the port's three main customers and all growing.

"Carnival is adding some turns, Norwegian is adding turns and Royal is going to Bermuda next year with the Serenade of the Seas for the first time," noted Vanderbeeke, speaking to Cruise Industry News. "Norwegian is also doing a two-week Caribbean round-trip, that's the first one we've had."

Earlier this year, the Black Falcon Cruise Terminal was renamed in honor Mayor of Boston and U.S. Ambassador to the Holy See Raymond L. Flynn.