
The Airbus A320-200 with 162 people on board left Juanda international airport in Surabaya in east Java at 5:20 am Sunday and had been expected to arrive in Singapore at 8:30 am (0030 GMT).
"The president has been briefed on AirAsia Flight 8501 and White House officials will continue to monitor the situation," White House spokesman Eric Schultz said late Saturday.
Malaysia-based AirAsia said the pilot of flight QZ8501 had requested "deviation" from the its flight plan because of bad weather, and that a search and rescue operation was underway.
Indonesia's air transportation director general Djoko Murjatmodjo told AFP the plane was carrying seven crew and 155 passengers -- 138 adults, 16 children and a baby.
Local broadcaster MetroTV reported that the passengers included 149 Indonesians, three South Koreans, including a baby, one Briton and one Malaysian and one Singaporean.
Obama and his family are on vacation in his home state of Hawaii for the holidays.