Originally Posted by
pinniped
CHALLENGE ACCEPTED.
Yes, that's generally true - although when I flew through there in 2019 I noticed a sign that a couple specific flights did not have preclearance and you'd go through immigration after landing in the U.S. I don't know if there's a predictable pattern to it or not.
I think all EI and US carrier flights use the facility, the only one that didn’t was Ethiopian Airlines ADD-DUB-LAX iirc