I've got a lot of UAL miles 400K, and only about 70K on DL. I need to use 40K for a 1st class Delta flight, and actually have reservations held for each one.

For United, I need to go to office and get a paper ticket. Must ticket by July 2, Delta I must ticket by tomorrow, or face a fee.

Just thought I'd see what FTers think - better to maintain large balance in UAL; or dump UALs in case they go under; does it make no difference? I can easily get to a ticket office, so that isn't too much of a concern.