"We are making adjustments to our schedule to minimize the disruption to customers as much as possible, by optimizing the deployment of the rest of our fleet and looking at alternative options, including accommodating customers on other airlines", an Air Canada spokesperson said.
This makes the United States the last major country to pull the jet from service following Sunday's crash in Ethiopia.
There are about 350 MAX 8s now in service around the world.
He said there are similarities between the Ethiopian Airlines flight profile and that of a Lion Air flight involving the same aircraft that crashed off the Indonesian coast in October.
U.S. airlines that operate the 737 MAX, Southwest Airlines Co, American Airlines Group Inc and United Airlines, said they were working to re-book passengers. The order to ground the planes comes as other nations grounded the aircraft type, and under increasing pressure for the U.S.to follow suit.
The airline says some delays and cancellations will occur "as this is a very fluid situation".
"Any plane now in the air will go to its destination and thereafter be grounded until further notice", President Trump said.
USA aviation authorities issued instructions to carriers following the Lion Air crash to update flight manuals with details for the flight crew on what to do if the plane's anti-stall system is erroneously triggered.
An Ethiopian delegation led by the accident investigation bureau has flown the black boxes from the Ethiopia plane crash from Addis Ababa to Paris for investigation, Ethiopian Airlines said on Thursday. "The MAX 8 could have been scheduled on any of our routes so it is hard to give an exact number of times this aircraft is typically used from each airport", a statement from Sunwing, which has four of the aircrafts, says in part. "We are going to go rent a auto and drive to Orlando", Olivia Crumbley said.
He says that "we have a range of options".
A MAX 8 flight from Los Angeles into St. Louis-Lambert International Airport was in mid-flight when the announcement was made.
These governments and airlines have suspended the use of the jets or banned them from entering their airspace.