Palm Beach International Airport officially became President Donald J. Trump International Airport on Thursday after the Federal Aviation Administration approved the change, making it one of a dozen U.S. airports named for a president and launching a transition that will temporarily leave travelers using two different airport identifiers.

The renaming follows legislation signed by Florida Gov. Ron DeSantis in March that transferred naming authority for the state's major commercial airports to Florida and redesignated Palm Beach International Airport in honor of President Donald Trump.

The FAA said the name change took effect July 9 after completing the required federal approvals.

For the next 40 days, however, passengers will continue using the familiar three-letter code "PBI" when booking flights, checking baggage, and viewing itineraries. The airport's International Air Transport Association (IATA) code will not change to "DJT" until Aug. 18, while aviation operational systems used by the FAA and the International Civil Aviation Organization began using the new identifiers Thursday.

The split is designed to give airlines, airports, and reservation systems time to complete technical updates without disrupting travel.

Henry Harteveldt, an airline industry analyst at Atmosphere Research Group, told CBS News that carriers have prepared for the transition.

"Airlines have told me that, at least initially, people who use the PBI code on their websites to search for flights will be directed to flights from what will now be called DJT," Harteveldt said.

"I've also been told that flight attendants will be given leeway to say, 'Welcome to West Palm Beach' rather than 'Welcome to Donald J. Trump International Airport,'" he added.

The International Air Transport Association confirmed it approved the code change following a request from airlines serving the airport.

"IATA has acted on a request from airlines serving Palm Beach International Airport to change the airport's IATA 3-letter code from PBI to DJT, along with the change of the location name to President Donald J. Trump International Airport," an IATA spokesperson said.

Airport officials are urging travelers not to begin using the new code until Aug. 18.

"While we recognize that the required name change may be received in different ways by our passengers, we're grateful for your continued support through this transition period," the airport said. "We remain committed to serving all passengers and ensuring a positive travel experience."

According to airport guidance, passengers searching for flights, checking baggage information, or reviewing airline schedules should continue entering "PBI" until the IATA transition is complete. Pilots and aviation partners, however, will see the new FAA and ICAO identifiers reflected in aeronautical publications and operational systems immediately.

The airport serves nearly 8 million passengers each year and is a frequent destination for Trump because of its proximity to his Mar-a-Lago estate in Palm Beach. The facility has long served as the primary gateway for presidential travel to South Florida during both of Trump's terms in office.

The renaming is part of a broader tradition of naming major U.S. airports after presidents, including:

– Ronald Reagan Washington National Airport in Virginia

– John F. Kennedy International Airport in New York

– Bill and Hillary Clinton National Airport in Arkansas

– Gerald R. Ford International Airport in Michigan

With Thursday's change, President Donald J. Trump International Airport joins that group while completing its final passenger-facing transition next month.