Originally Posted by
mherdeg
Does CO let you do a same-day confirmed change on a flight that includes international segments?
Yes.
Originally Posted by
mherdeg
Does UA?
No.
Originally Posted by
mherdeg
Also, does CO let you do a same-day confirmed change onto flights which have seats left, but where inventory management has not released the identical class of service you booked?
No, but if it is a flight before your scheduled departure you can list as a standby and will likely clear. If it is a flight after your scheduled one then you can run into issues (I did recently) but the much wider time-frame and flexibility is still worth more to me personally.