Originally Posted by
IADDCA
So I understand that United doesn't give free upgrades on intl flights. Mrs IADDCA is headed to Europe and the plane is <40% full. There are enough empty seats in BusinessFirst to upgrade all but one person in EconomyPlus. If you don't have a bunch of people walk up paying full fare at the last moment or using their miles for an upgrade, do all of these BusinessFirst seats just go empty?
How do you know that "the plane is < 40% full"?
You cannot judge by the seat map. In addition, depending how far away the flight is, UA could still sell those seats.
Nonetheless, check your itinerary to see if they are offering any buy-ups for a reduced price and it an offer matches your price point, take it.