Question: First us president to fly in an airplane?
Disambiguated questions and answers: question: First ever us president, past or present, to fly in an airplane?
First us president to fly in an airplane while in office?
answer: Roosevelt
Theodore Roosevelt
Franklin D. Roosevelt
Roosevelt
question: First us president to fly in an airplane after being in office?
First us president to fly in an airplane while being in office?
answer: Teddy Roosevelt
Theodore Roosevelt Jr.
Theodore Roosevelt
Franklin Delano Roosevelt
Franklin D. Roosevelt
FDR
Natural Questions answer: Theodore Roosevelt (from the Wikipedia article "Air Force One")