The FAA oversees civilian air travel in America. According to the FAA's International Flight Information Manual: "Aircraft flying into, out of, or through U.S. airspace will need to comply with several requirements. Most of these requirements pertain to national security and apply to U.S. and foreign registered aircraft alike. U.S. airspace is subject to rules set by the Federal Aviation Regulations (FARs), the Department of Homeland Security (DHS), and the Department of Defense (DOD)."
As with domestic flights, one must review the security measures currently in place. With international flights, it is important not to forget your passport. For some destinations, a visa is also needed. Arrive earlier at the airport than for domestic flights--two to three hours before the scheduled departure time is appropriate. Check with your airline for a more exact estimate.
You can get flight information, such as estimated time of arrival and gate of arrival, from the Internet if you also have the airline name, flight number, and date of arrival. You can also get this information from the information boards or personnel at the airport.
