See the US's presidential aircraft fleet that Trump wants to add to with a $400 million gift

Air Force One is a call sign that refers to any US Air Force aircraft transporting the president, though it is commonly recognized by its blue-and-white livery.

The Air Force has two "specially configured" Boeing 747-200B jets that are primarily used as Air Force One. The VC-25A aircraft is uniquely modified to serve as an airborne command-and-control center for the president, staff, and guests with the same level of safety and security as the White House.

Other than the number of passengers it can carry, the main differences between the VC-25 and the standard Boeing 747 include more advanced electronic and communications equipment, a self-contained baggage loader, and the capability for in-flight refueling.

The VC-25 also has a rest area and mini-galley for the aircrew, six passenger lavatories, and a compartment with medical supplies and equipment for minor in-flight emergencies.

For shorter distance trips, especially to and from the White House, the president flies in Marine One, which includes military helicopters like the VH-3D Sea King and the VH-60N White Hawk.

In service for nearly five decades, both military helicopters are set to be phased out and fully replaced with modernized rotary-wing aircraft, the VH-92A.

The next-generation Marine One is designed to be a militarized variant of the Sikorsky VH-92 Patriot.

The presidential fleet also includes other fixed-wing aircraft besides the modified 747. The C-32A, a modified Boeing 757-200, is better suited for smaller airports or low-profile missions.

The C-40, based on the Boeing 737, can be used to fly the president but is more often used for Cabinet members or other VIP individuals.

Based on General Dynamics' Gulfstream long-range business jets, the C-37 is used to transport high-ranking government and Defense Department officials for worldwide missions.

The two planes currently being used as Air Force One have been in service for nearly four decades. They are set to be replaced by a modernized variant dubbed the "Next Air Force One."

Officially designated the VC-25B, the new presidential aircraft is set to feature "electrical power upgrades, a mission communication system, a medical facility, an executive interior, a self-defense system, and autonomous ground operations capabilities," according to an Air Force release.

The two future VC-25B jets were initially scheduled to be fielded in 2024, but supply chain issues and shifting requirements could postpone their delivery to 2029.

Facing pressure from the White House to have the new aircraft ready before Trump leaves office in January 2029, the Air Force and Boeing are aiming to have the new aircraft delivered by 2027, according to Darlene Costello, the Air Force's principal deputy assistant secretary for acquisition, technology, and logistics.

An Air Force official told Air and Space Forces Magazine that the service is coordinating with the White House and Boeing "to further define the requirements and acceleration options while ensuring we provide a safe, secure, and reliable aircraft for the president."

Trump has previously expressed his frustration with receiving the next-generation Air Force One, suggesting earlier this year that he may seek "alternatives, because it's taking Boeing too long."

Despite the backlash, the president doubled down on his proposal to use the Qatari jet as Air Force One, saying he doesn't plan on using it after his term and would donate it to a future presidential library.

"I could be a stupid person and say, 'No, we don't want a free, very expensive airplane,'" Trump told reporters Monday.

Though free in cost, there's still a major cost to overhaul and retrofit the plane with the strict security requirements needed to serve as Air Force One.

"Along with the obvious ethical and legal issues, a $400M gifted luxury jet is not Air Force One," US Rep. Joe Courtney of Connecticut wrote on X. "Retrofitting a plane from Qatar would create huge costs & a security nightmare that would impede the work underway to deliver the actual AF1 by 2027."