Originally Posted by
Steve M
But that's easily accessible if you're already on the MRT. If on the other hand, you're on the MTR, you probably need to take it to the airport and then fly to where you can get on the MRT.
If you are on the MTR, you'll have to take a bus or a taxi from the Tung Chung terminus. You could, of course, take the AEX all the way into the airport. But that's not "the MTR", even though it's run by the MTR Corporation.