I recently stumbled upon SeatGuru, a wonderful site where you can search by airline then by aircraft to get reviews to help you select your seat.  Find out which seats are good or not so good – avoid those without under seat storage & be sure to grab one with DC power!  This site pretty much contains everything you’d need to know about nearly every airline around the world.  They’ve got each airline’s general info along with their policies on check-in, baggage, infants, pets, etc., all in once place.  I find this much easier than navigating an individual airline’s website.

Flight Amenities