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.
Once these details have been entered, you will be taken to a seating plan where you can begin to select your desired seats. 1  Thomas Cook Click here to pre-book your seats. 2  Manos Click here to pre-book your seats. 3  Airtours holidays Click here to pre-book your seats.4  Thomson Click here to pre-book your seats.f you booked on or after 30 April 2015: Most airlines now offer the choice to select your seat when you check in online, including Easyjet and Ryanair. You will be given various payable options, including confirming leg room seats.