Cruise.com offers a Carnival 7-Night New England and Canada Cruise for Two with prices starting from $918, as seen on Travelzoo. That's the lowest price we could find for such a cruise in September by $20. This roundtrip cruise aboard the Carnival Sunshine departs on September 23 from New York, NY, with stops in Boston, MA; Portland, ME; Saint John, Canada; and Halifax, Canada. Book this travel deal by May 31.