Why do Canadian airports begin with Y?

Related questions

1. How far in advance should I get to the airport?
2. How many hours before flight can you enter airport?
3. Can I clear US customs in Ottawa?
4. Are dogs allowed in the Ottawa airport?
5. Can I stay at the airport overnight?
6. What is preclearance at airport?
7. Which countries have US preclearance?
8. Do you clear US customs in Ottawa?
9. What airport is in Ontario Canada?
10. Is Ottawa airport open 24 hours?

Tags

1. #letter
2. #their
3. #toronto
4. #start
5. #about
6. #airports
7. #having
8. #vancouver
9. #despite
10. #known
11. #montreal
12. #think
13. #other
14. #canadian