Do the research before you upgrade: Seat Guru makes it easy with their handy Premium Economy Comparison Chart detailing U.S. and international airline offerings including seat width, seat pitch ...

I recently took a seven-hour flight to London and back to my home in Newark — one in United's premium plus and the other in economy. Let's compare the two. First, let's talk about the cost.

I recently tried out three fare classes, including business, premium, economy, and regular coach. While business and economy were different, both were enjoyable. But premium economy could be better.