The light-year is a unit of length used to express astronomical distances. It is about 9.5 trillion kilometres or 5.9 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days). Because it includes the word year, the term light-year is sometimes misinterpreted as a unit of time.
You can select your seat online if: 1  You book your flight on aircanada.com., and. 2  You re travelling on: 3  Seat selection is not available on codeshare flights.4  an Air Canada or Air Canada rouge flight, or. 5  an Air Canada Express flight operated by Jazz, Sky Regional, Air Georgian Ltd. or Exploits Valley Air Services Ltd.ou can select your seat online if: 1  You book your flight on aircanada.com., and. 2  You re travelling on: 3  Seat selection is not available on codeshare flights.
Get maximum legroom in economy class by flying JetBlue (if it goes where you're going). Other airlines (TWA, American) have experimented unsuccessfully with giving every seat in economy class extra legroom, but only JetBlue seems to have made a go of it.f in fact all the cheap seats are taken, you'll get a premium economy seat when you check in. You can also try calling the airline directly to see if they'll give you a seat assignment. 2. Watch for (and ask for) cheap last-minute upgrades to business and first class.