The best cruise length for your family depends on many factors, including the age of your kids and what you plan to do on your cruise. Arguably, the age of your kids may play a huge factor, as it may be challenging to bring an infant on a two-week cruise, but it may be equally difficult to work around a teenager’s school schedule for the same amount of time. Generally, a seven-day cruise is your safest bet for a family getaway. It ensures you can fully enjoy your trip, yet it won’t be too overwhelming for your kids.