Originally Posted by
DoB840
Can one select seats for both segments of a connecting flight after T-24 from the first segment (but more than 24 hours before the second segment)?
Yes you can. As an example, say you are going Canada to somewhere in Europe, with a connection at LHR. When the long haul check in opens, you can check in for the short haul within Europe as well, even though it is more than 24 hours to that segment.