Originally Posted by
pmarrsouth
Bids close (ie you cannot bid) at 72 hours before flights (I believe). Bidders are informed 24-48 hours out on the outcome of their bid. It’s unlikely that you were beaten out by a bidder with 10 minutes to go before boarding. Maybe someone SDCd to your flight, or a J misconnect from earlier arrived and was put on your flight
You can always LMU up to 45 min before your flight. After that, the flight closes and upgrades are processed.