Medical travel insurance costs can vary greatly, depending on factors such as age, the length of the trip and the type of coverage desired. Generally, the cost of medical travel insurance for a US trip can range from a few dollars a day to hundreds of dollars for a single person. The cost may also increase if multiple people are traveling together. It is important to research different plans and compare coverage and costs before selecting the policy that fits your needs. Additionally, always be sure to read the fine print to ensure you are getting the coverage you need for your US trip.