But typically as long as everything is on the same ticket you're good, even if you're technically accessing the club the day before or after your qualifying flight. The "before 6am" rule is not meant to exclude certain lounge access scenarios that would otherwise be fully eligible if the itinerary didn't span more than a single calendar day. I would certainly give it a try at SFO and PHX. Just hand them your boarding pass, say you're going to Canada and let them scan it in and see what it says. They'll most likely waive you in.