Make a sun-streaked arc through the tropics during a 15-night Panama Canal cruise on the Celebrity Infinity, a ship Cruise Critic praises for its "elegant, contemporary air" and "sleek Scandinavian styling." This sale from American Discount Cruises cuts up to $300 off current prices.

Settle into an oceanview cabin for $1299 per person and receive $175 per cabin in on-board credit. Other room categories, such as balcony rooms and suites, are also discounted and come with bonuses like on-board credit and pre-paid gratuities (a value of $345-$450 per reservation). 

The ship departs San Diego on Nov. 22 and includes stops in Cabo San Lucas, Puerto Vallarta, Guatemala and Costa Rica, then sails through the canal and on to Colombia before docking in Miami.

Take the trip in reverse on Nov. 7 for $50 more per person. An Oct. 7 sailing on the Celebrity Millennium is $100 more per person, and a springtime journey launching April 1 is also discounted.

Note: Taxes of about $300 per person are additional, and include a mandatory tax charged to all ships that pass through the Panama Canal.

Travelzoo Tip: Now is a great time to plan the trip. Airfare can be added to the itinerary at far more reasonable rates than what are typically available later in the year.