I flew US Airways the other day and before I left for the airport I checked online to see what the cost of checked luggage was, online it said $15 for the first bag and $25 for the second. So I made sure to squeeze everything in to one bag.
Then when I got to the counter they said it would be $20. I said that's not what the US Airways website said. And they said that price was online for people who checked in online. So there is a $5 surcharge for checking your bags in at the airport. I was tempted to step out of line and pull out my laptop to log on.
Just misleading on US Airways part not mentioning the increase in price for checking in at the airport. Also you get to board sooner if you check in on-line.