Final answer:
Passengers are allowed to bring up to 5 pounds (2.27 kg) of dry ice per person when properly packaged and labeled.
Step-by-step explanation:
According to the Federal Aviation Administration (FAA), passengers are allowed to bring dry ice in their carry-on or checked luggage as long as it is used to pack perishables. The FAA sets a limit of 5 pounds (2.27 kg) of dry ice per passenger. It is important to note that the dry ice must be properly packaged and labeled to ensure safe transportation.
For example, if you have 2 passengers, you would be allowed to bring up to 10 pounds (4.54 kg) of dry ice in total.