Hello! My wife and I will be flying from Chicago to London with British Air. As of now, we are booked in Premium+ class. I know there are business class seats available for sale ($7000 hah!). I have enough Avios points to upgrade to Business class for the 2 of us (eventually) but this class is not open for folks upgrading.
Do any of you familiar with British Air or American know WHEN they usually open those 'unsold' seats up for upgrade?...like how long before your trip? We are 4 weeks out.
Thanks for your help!
Michael