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.
Seats with more legroom. Preferred Seats are seats with more legroom in Economy Class. With preferred seat selection, you have the additional option for selecting and guaranteeing these seats for your booking in Economy Class, which now have up to 23 preferred seats available on each flight.Aircraft type. Number of preferred seats available.dvance purchase online. Purchasing preferred seats is easy and convenient. You can either make your purchase when you make your flight booking on singaporeair.com or anytime before check-in (48 hours before flight departure). Simply retrieve your bookings on singaporeair.com to make your selection.