Cruise vacations don't have to be expensive. In fact, there are plenty ways to find cheap cruises. If you want to plan a fabulous cruise vacation on the cheap, consider three ways to book an inexpensive trip.

1. Plan a Group Cruise: One of the best ways to find cheap cruises is to plan a group trip. Cruise lines reduce the price for groups, and travelers can save up to $200 per person. Contact a travel agent and inquire about group prices. In some instances, you'll need a certain number of passengers to be eligible for group rates.

2. Travel Off-season: Holidays and summer time are the busiest travel times. Anyone who plans a cruise vacation during these times of the year will pay more. If you're looking for cheap cruises, travel during the fall, winter, and early spring.

3. Choose a Short Trip: Cruise vacations vary. While most vacations are five to seven days, it's possible to find a three or four day cruise vacation. You'll be able to save money, but enjoy the same level of fun.