What's the cheapest time to buy airline tickets?
The best time to book airfare is within a window of 21 to 74 days before you plan to fly, and the cheapest tickets are generally on midweek flights. You can also save if you use an airline miles credit card to book flights that help you earn miles or points toward future air travel.

https://www.honor.com/globalgm/club/topicdetail/topicid-36241479535...