When will the flight ticket to Beijing be cheaper?[请求]

[drizzle]

My parents plan to go back to Beijing in May or later, does anyone have an idea when the ticket will be cheaper?
(Sorry, I can not type Chinese at work )

Thanks in advance

 

[Kent以东首帅哥]

check aircanada's website. The prices for March, April are low.
After May, it's very high for traval seasons.

 

[drizzle]

Thanks a lot.