On Monday, I went online to check in for my BOS-DCA flight. While doing so, my office phone called, so I was trying to do two things at once. When I got to the boarding pass screen, I realized I didn't click that I had a bag to check. I played it off as I got distracted by the phone call.

I just went to check in online for my return flight tomorrow and I didn't notice an option to check a bag online.

Anybody else notice this or is there a policy/notice about checking in bags online that I missed? I searched through the forum and couldn't find anything since mid October, so I apologize if it's a repeat.