The meeting comes after the downing of Malaysian Airlines flight MH17, while flying over a war-torn area of Ukraine. One Canadian was among the 298 people who died.
Since then, all commercial airlines have been avoiding flying over Ukraine.
Then, last week bombs fired from Gaza landed near Tel Aviv airport, leading most international airlines to suspend flights to Tel Aviv.
ICAO says Tuesday's meeting will discuss "appropriate actions to be pursued in order to more effectively mitigate potential risks to civil aviation arising from conflict zones."