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.
For instance, Premier 1K members can reserve seats in Economy Plus for up to eight companions, while Premier Silver members can only reserve a seat for one. If there is space available in the next class of service, Premier members may enjoy Complimentary Premier Upgrades on select United Airlines flights.