when is the best time to buy cheap international plane tickets?

If you are looking for the cheapest air tickets,

--- the best time to book is: book early, as for an international flight four or five months before departure. There is no other rule.

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http://www.willgoto.com/1/147195/liens.aspx

--- th best time to travel : the cheapest days (usually midweek flights are cheaper than week end flights) in the low season (depends mainly on your routes; July to August are always expensive months).

Read more:
http://www.willgoto.com/1/147265/liens.aspx

Don't confuse best time to book and best time to travel.

According to my travel experience you should book after mid night on Wednesday because on that day each and every travel site and airlines releasing online sale for plane tickets and you can book it as per your requirements.

Thanks for reading my answer!

Depends on where you're going from and to.

It is always advisable to book cheap flight tickets in early. You can book for an international flight three or four month before your date of travel. Searh, compare and choose best price of flights ticket with exclusive offer and discount via many sites like makemytrip, yatra, ixigo, cleartrip and etc.

When fuel prices are low. In advance. 1 month or more.

5 past 12

#:02 a.m. (GMT) on a Wednesday

The farther ahead of time you can buy plane, bus, or train tickets, the cheaper they'll be.

When your mom tells you to visit her.