Travel insurance policies cover more than just the travelers listed on the policy. Many reasons for cancellation and interruption extend coverage to family members and traveling companions. A traveling companion can be somebody that has arranged to travel with you, and only requires that the two travelers have a common itinerary showing the same dates and locations. There can be various cities and dates of departure as well as return, so long as a portion of the trip shares the same itinerary. Also, the covered reasons involving a traveling companion must occur during the shared portion of the itinerary. Always refer to the certificate of insurance for specific details.