Hi - I will be flying from Seattle to Frankfurt in October, and have been wondering when I should purchase tickets to get the best deal. I have already set up a low fare alert through Kayak. Thanks.
No one really knows. What you can do is start watching the fares now to get an idea of what they are running. Then you will be able to recognize a good deal when one comes along. Be ready to buy when you see something better because sometimes there are limited seats at the sale price.
I typically go to Europe final week in Nov and stay for a week or 2. this has been an annual habit for the past 7 years now. I have purchased my tickets as early as May and as late as Aug/Sept. Only once has the ticket price rose on me; I bought tickets to Brussels for $867 in August........In september, they decreased by $100. As many may tell you, there is no method in buying tickets. Once you find a price you are willing to deal with, then go for it. I travel in the winter because I can not justify a $1200 ticket. I wait and go in the winter when I can find a ticket for $650-900.