Originally Posted by
Pseudo Nim
Right, that is what I was trying to establish. So then unless there is a responsible adult at the destination of the UA flight specifically (irrespective of onwards connections), this is a nonstarter. Thanks - this clarifies it.
As mention in the wiki, UA will only accept UCM on a non-stop UA segment with no connecting segments including other airlines.
A four connection itin seems excess, BKK-XXX-YYZ with XXX in Europe should be the goal.
What happens in irrops, mis-connect, ....