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.
1 Choose your seats as soon as possible so that you have the widest selection of locations from which to pick. 2  Normally, you can do this when you buy tickets online. ( 3 Exceptions are when your flight is in the distant future or you select a flight on an airline that does not display seats). If you're changing planes and don't have a long layover, choose seats as close to the front as you can. 2  Travelers who sit in the back usually get to board the plane first, which gives them first dibs on stowing overhead luggage.