AirTrain is the name of several passenger railway operations connecting airports to existing rapid transport systems and city centres:

• Airtrain Citylink, a railway infrastructure company in Brisbane, Australia
  • Airport railway line, Brisbane, Australia
• AirTrain (San Francisco International Airport), serving San Francisco, California
• Operated by the Port Authority of New York and New Jersey:
  • AirTrain JFK, serving New York City's John F. Kennedy International Airport
  • AirTrain Newark, serving Newark Liberty International Airport in New Jersey
  • AirTrain LaGuardia, a proposed service to New York City's LaGuardia Airport

Air Train was the name of a small cargo airline that, in 1990, became Emery Worldwide Airlines, for a decade a significant US freight airline.