I want to book a domestic flight in the US. I want the option to add extra luggage. I'm planning to book through Expedia, but I'm not able to add extra luggage, any suggestions? Do I have to add through the airline website only? Also, I want to take 2 checkin bags, is the price same for both the bags. I've heard if they overbook, they first kick out the people who are booked through these websites. I'm a student, and here are my three concerns: I need cheapest tickets, I need to make sure I get on the flight, as I am starting my internship the next day( I have to start next day as I could not find any accommodation to keep some buffer), and I've never booked any flight tickets here, so I want to make sure I do things correctly. Please help me.
Thanks.