LTA may refer to:

Science

  • Lipoteichoic acid
  • Lighter than air, sometimes used in ballooning as in an "LTA pilot license"
  • Linde type A molecular sieve, an aluminosilicate drying agent
  • Light transmission aggregometry, a method for measuring the aggregation of platelets in blood
  • Long-term average, a type of moving average
  • Lymphotoxin alpha

Companies and organizations

  • Business Administration Union, a trade union in Finland
  • Land Transport Authority, a statutory board under the Ministry of Transport of Singapore
  • Lawn Tennis Association in the United Kingdom
  • League of Legends Championship of The Americas, a former esports league for League of Legends
  • Learning Through Art, an educational program of the Guggenheim Museum in New York
  • Lambda Theta Alpha, Latin Sorority, Incorporated
  • Línea Turística Aereotuy, a Venezuelan airline

Other uses

  • Lieutenant in Singapore Civil Defence
  • Legs, Trunk, Arms, now PR3, an adaptive rowing classification
  • Long Term Agreement, a.k.a. Frame contract Framework agreement
  • Louis Troy Austin (born 1991), English singer