Travel insurance is insurance that is intended to cover medical expenses, trip cancellation, lost luggage, flight accident and other losses incurred while traveling. Travel insurance can usually be arranged at the time of the booking of a trip to cover exactly the duration of that trip, or a “multi-trip” policy can cover an unlimited number of trips within a set time frame. Some policies offer lower and higher medical-expense options; the higher ones are chiefly for countries that have high medical costs, such as the United States.