Southwest Airlines said hundreds of flights had been delayed by technical issues and warned passengers flying Monday to arrive two hours early and print boarding passes before coming to the airport.

Northwest Airlines this month became the second U.S. airline--and the largest one so far--to let passengers check in for flights and print boarding passes on their personal computers.

Even though mobile boarding passes are convenient, printing a paper boarding pass is a good idea to avoid any travel mishaps ...

Southwest Airlines is starting to roll out mobile boarding passes, and for anyone who flies as much as I have over the last few years, this is very welcome news. I've been here at South by ...

Q I am traveling on a Sunday and don't have a printer at home. How far ahead can I print out my boarding pass? I'd like to be able to do that from work on Friday. A Sadly, you won't be able to use ...