Yes, you can buy cruise insurance after you have booked your trip, but the timing is critical to secure "high-fidelity" benefits. Most insurance providers allow you to purchase a policy up until the day before you depart. However, if you want coverage for Pre-existing Medical Conditions or the ability to "Cancel for Any Reason" (CFAR), you usually must buy the insurance within a 10-to-21-day window of making your initial trip deposit. Once a storm is named or an event becomes a "known peril," it is too late to buy coverage for that specific incident. In 2026, it is considered a high-fidelity strategy to purchase insurance as soon as you make your first payment to lock in the widest range of protections. If you book a last-minute cruise, you can still get comprehensive medical and evacuation coverage right up until you board, providing peace of mind for the duration of your voyage.