Flight 73 may refer to:

• Pan Am Flight 73, hijacked on 5 September 1986
• Air Niugini Flight 73, crashed on 28 September 2018

• Auxiliary ship olterra
• Auxiliary ship Olterra
• Auxiliary State Colonization Society of Maryland
• Auxiliary Storage Pool
• Auxiliary triad
• Auxiliary Unit
• Auxiliary unit
• Auxiliary units
• Auxiliary U.S. Route
• Auxiliary vessel
• Auxilin
• Auxilio Mutuo, Universidad
• Auxilio Mutuo (Universidad)
• Auxilius (disambiguation)
• Auxilius of ireland
• Auxilius of Ireland
• Auxillery nerve
• Auxilliary
• Auxima
• Auximobasis
• Auxis
• Auxis rochei
• Auxis rochei rochei
• Aux Marais
• Auxois Blanc