Note: Under U.S. law, all travellers (including Canadians) departing the United States by air to any destination (including Canada) must present a valid passport (or a NEXUS card for return to Canada only). For example, if a Canadian citizen enters the United States by land by presenting acceptable documents other than a passport, and then plans to board a flight in the United States destined for Mexico (i.e. an international destination other than Canada), a valid passport is required for the air travel portion. Similarly, if a Canadian citizen drives to the United States and returns to Canada by air, a valid passport or a NEXUS card must be presented to board the plane. It is important to note that a passport is not mandatory for air travel within the United States.

Canadian citizens intending to fly to, through or from the United States should apply for a passport, keep it up to date and carry it with them when traveling. For more information about passports, please visit Passport Canada's Web site.