"Representatives from Global Affairs Canada's Standing Rapid Deployment Team and the Transportation Safety Board are currently stationed in Ankara. To date, Iran has granted us two visas," Champagne tweeted on Friday, Xinhua news agency reported.
"We are hoping the other visas will be approved soon so that we may begin to provide consular services, to help in the identification of victims and to participate in any investigation," he added.
The plane crashed minutes after takeoff from Tehran's Imam Khomeini International Airport early Wednesday local time.
Canadian Prime Minister Justin Trudeau said on Thursday that the Ukrainian plane was shot down by an Iranian surface-to-air missile and he called for "a full and complete and credible investigation to establish exactly what happened."
"We have intelligence from multiple sources, including our allies and our own intelligence," Trudeau said during a news conference in Ottawa. He added that the Iranian strike "may well have been unintentional."
The Iranian authorities have repeatedly denied allegations or speculation that the crash of the Ukrainian flight was caused by an Iranian missile attack.
Iran has called on the United States and Canada to release information backing their allegations the plane was brought down by an Iranian missile.
Iran has also invited Russia, Ukraine, France and Boeing to participate in the investigation of the crash.
( With inputs from IANS )