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.
Tango paid seat selection is only available when booking directly at aircanada.com/agents. All passengers including those booked on Tango fares can use web check-in and select their seat up to 12 hours before departure. Click here for more information on Air Canada s web check-in.ango paid seat selection is only available when booking directly at aircanada.com/agents. All passengers including those booked on Tango fares can use web check-in and select their seat up to 12 hours before departure. Click here for more information on Air Canada s web check-in.
up vote 7 down vote. Partial answer: Airlines that allow you to select seats during booking show how many seats are available, I've used this myself. However the further ahead of the flight you book the more likely it is that more passengers sign up.p vote 7 down vote. Partial answer: Airlines that allow you to select seats during booking show how many seats are available, I've used this myself. However the further ahead of the flight you book the more likely it is that more passengers sign up.