The first successful ionothermal synthesis of silicoaluminophosphate (SAPO) with the LTA framework is presented. SAPOLTA was synthesized in 1-butyl-3-methylimidazolium bromide ([C(4)mim] Br) in the presence of tetramethylammonium fluoride ([Me4N] F). [C(4)mim] Br is solvent as well as structure-directing agent (SDA) whereas [Me4N] F functions as both mineralizer and co-SDA. The presented ionothermal synthesis offers an efficient method compared to the conventional hydrothermal synthesis.