Originally Posted by
Goodoldflyer
I believe there's a place for that specific flight, and also a place in your account that you can set in general.
You can select a preference for window and aisle.
I wish there were also a selection for "don't upgrade me and a companion in comfort+ unless it's a configuration like I already have (two seats on the side)", as I'd rather be in MAIN unless we get that specific configuration.
https://www.delta.com/my-profile/preferences
The link for itins is shown below. I've noticed sometimes the upgrade to First request can get de-selected on individual itins. Not sure what causes this, but I just noticed mine were de-selected below and I had to re-request them. If you've ever checked-in and found that you are not on the FC upgrade list, this is probably what happened. It can also cause you to get passed over for window upgrades.