Originally Posted by
ericwang0658
Like catgirl said, the system is quite strict on time. Sometimes you can also call in Air Canada Priority Contact and they may be able to provide you further information regarding to the e-upgrade attempt.
No, don't call them. They are still confused about the window as they were two years ago. The window opens exactly at departure time at departure point minus 168/96/48 hours depending on status, for each segment of your trip. If you are flying LHR - YVR (14.25) and YVR - YYC (18.00), you request your 1st upgrade at 14.25 London time 168/96/48h prior. Then wake up at 2 a.m. in LHR to request an upgrade for the 6 p.m. connecting flight from YVR to YYC. The same rule applies on the YYZ - SYD route via YVR. Even though you are travelling on flight 033 from YYZ to SYD, you must request upgrades separately for YYZ-YVR and YVR-SYD at the appropriate departure time windows. Good luck if you are figuring local Australian and Canadian times in Bora Bora.