Home > Travel information > Destination information > International travel
Customers traveling across any international boundary are responsible for obtaining all necessary travel documents for departure and arrival.
Read about the Secure Flight program, which is designed to enhance air travel security through the use of improved watch list matching.
Prior to check-in for a flight to the U.S. or a connecting flight through the U.S., the U.S. Department of Homeland Security requires Visa Waiver Program travelers to obtain approval from the Electronic System for Travel Authorization (ESTA).
Certain countries require that the passenger cabins of aircraft be treated with insecticides. For additional information and a list of those countries, please visit the U.S. Department of Transportation’s disinsection website.
Calculate currency equivalents between major world currencies.
For the latest travel advisories, visit the U.S. Department of State website.
American, Australian and Canadian citizens are required to pre-pay a Reciprocity Fee for entry into Argentina. The fee was previously collected at Argentine airports upon arrival; however, customers must now pay the Reciprocity Fee online through Argentina's National Immigration Agency website before checking in for their flight to Argentina. A barcoded receipt for payment must be presented to a representative at check-in.
United is not permitted to transport to Argentina any American, Australian, or Canadian citizen who has not paid the Reciprocity Fee prior to departure. Failure to provide a copy of the barcoded payment receipt at check-in will result in a delay or possible denial of your travel to Argentina. Please visit https://reciprocidad.provincianet.com.ar for complete details, including the fee amount and the validity period. Any questions regarding this fee or the payment process should be directed to the Argentine authorities.
Learn more about compensation and assistance in the event of denied boarding and cancellation or delay of United-operated flights departing airports located within EU Member States.
Learn more about compensation and assistance in the event of denied boarding and cancellation or delay of United-operated flights to or from Israel.
Since June 24, 2013, United has participated in Heathrow Airport's Positive Boarding Program, which is intended to streamline the passenger journey through Heathrow and provide airlines with enhanced passenger boarding information to help facilitate efficient and timely airline departures. Please note that as part of United's participation in this Program, passenger information, including but not limited to name, transit location within the Heathrow Airport and other flight departure information, will be used by the Heathrow Airport Authority and United in order to monitor travelers’ passage through the Airport.
Using this information will allow United to better serve our customers in providing travel services requested by identifying and proactively working with passengers who might miss their flights. It is important that passengers traveling through Heathrow understand the use of their personal information for this specific purpose. By transiting through Heathrow Airport, passengers consent to the use of their personal information in this manner.
Each traveler arriving in Mexico must complete a Customs Declaration form.
The Secretary of the U.S. Department of Homeland Security is unable to determine whether Venezuelan airports that serve as the last point of departure for non-stop flights to the U.S. maintain and carry out effective aviation security measures in accordance with the Standards and appropriate Recommended Practices established by the International Civil Aviation Organization (ICAO). All flights are subject to continuing effectiveness of government approvals.