Standby Upgrade to F at T-6 for LAX-DFW leg of SYD-LAX-DFW flights possible?
My sister is traveling from SYD-LAX-DFW on Virgin Australia and Virgin America respectively. I'm based in the US.
Is it possible for me to upgrade her at T-6, given that she is already in the air on her SYD-LAX flight? Some questions?
1. Do I just revoke her prior check in for LAX-DFW?
2. Any issues with revoking her check in if her bags are checked through from SYD to DFW?
3. Should she just not check in for her LAX-DFW flights, and only have her bags checked through to LAX?
4. What am I missing?