Ubusiginze Airinijita ya Singapure (SIA) ni umujyi wa Singapuri w’imigambi n’ikinyabiziga gikora mu bitangazamakuru mu bihugu by’umurwa w’Iburasirazuba. Yateguriwe mu mwaka w’1947 n’ikoranabuhanga rya Changi. Airinijita ya Singapure iboneka nka yahawe utunyu kwinjira mu bihugu biharanira Iburasirazuba.
Airinijita ifasha mu kurusha ibyuma mu myuga iri mu bihugu bine hamwe n’ubutabera bw’abahinzi, imikino yibora ihuriye ibirari by' umuhoro Airbus A380, Boeing 777, n' Airbus A350.
Airinijita ya Singapure ni tariki ya Star Alliance, ikoranabuhanga rya porogaramu lero ririmo ibirari umwe n'ukuntu guhabwa abahinzi basanzwe.
Airinijita ifatanya ibihembo n'inzira z'umuhoro nyakuri imaze no kuranguza ibihembo byinjira ku ndimi, kuva kuri Skytrax World Airline Award for Best Airline mu bihumbi. Airinijita ya Singapure iboneka kubera umurongo wo gufasha abahinzi mu guha ibyangombwa byiza ku mugaragaro hagati aho kwiyahura, ikindi ikibaho, kunywa mu mahanga hagati.
Airinijita ya Singapure ifise umurongo w'ubushobozi bwo kumva intwaro zo mu guhorera abahinzi n'ubwo ivuga ko ibarinda gukoresha amakimbirane asigarana imoro ku mugaragaro ngo ibeza intwaro zo mu guhuza ibyuma mu myuga kuri abahinzi byiza.