Travel insurance is intended to cover medical expenses, trip cancellation, lost luggage, flight accident and other losses incurred while traveling, either internationally or domestically. Travel insurance can often 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 in the U.S.