Originally Posted by
biglinguist
Has anyone successfully done this -- used a single upgrade cert for both parts of a flight with a nearly-24-hour layover? If so, did you have to do anything special to make it work? (I'm looking at LAX-YYZ-LHR with a 23 hour layover in YYZ.)
I've done it before - you just explain to the agent in YYZ or wherever that the cert was pulled in ___. They can look in the system and confirm. Keep your boarding pass fronm the first leg as proof if necessary - it will show a J seat and "cert" in small letters.