"We have stopped at the airport, seven young Australians who were planning to travel to the Middle East it seems to join terrorist groups over there," Abbott told reporters in Canberra today.
It is unclear where the seven Australians were detained.
Australia is on high alert for attacks by radicalised Muslims, including home-grown militants returning from fighting in the Middle East, having raised its threat level to "high" and unleashed a series of high-profile raids in cities.
In addition to attempts to safeguard against any domestic attacks, Australian officials have intensified efforts to prevent radicalised citizens from joining organisations such as Islamic State.
"We are concerned about the number of people presenting at airports, particularly younger people, who might be seeking to travel overseas for reasons that would horrify Australians and their parents and family and community no doubt as well," Border Protection Minister Peter Dutton said.
Abbott has told parliament at least 70 Australians were fighting in Iraq and Syria, backed by about 100 Australia-based "facilitators".
