2 Roundtrip tickets from Boston's Long Wharf to Provincetown.

Provincetown Fast Ferry Round Trip Boston's oldest and largest ferry operator, offers the first, fastest and most luxurious 90-minute high speed catamaran service from Beantown to P-Town. You'll enjoy the coast's historic and scenic sites while relaxing in the refreshing sea breeze. Our ferry is the largest and fastest passenger-only catamaran in the U.S., landing in the heart of Provincetown in just 90 minutes. And with more onboard amenities and services than any other ferry in New England, getting there is half the fun.

http://www.bostonharborcruises.com/provincetown-ferry/