Hi,

I'm not seeming to find the answer on the airline websites, so I'm hoping you all will help me out. I've traveled recently, but usually carry-on.

I'm leaving for a 10 day trip in a few weeks. We're flying American Airlines there, and (edited) United Airlines back.

We need to check one bag, and I think it should just be $25 each way. But my mom heard somewhere that you need to pre-sign up for a checked bag online, or else it's like $100 if you just show up with a checked bag at the airport. Is this true?

If so, I can't find WHERE to sign up our checked bag. I booked the flights using credit card miles but there was no place to put "I will be checking a bag" on the website.

Thank you all!

Edited: I accidentally said Delta back when I meant United.