Some airlines, maybe all, won't sell you until a certain # days before, but you can start studying so you'll know what the market generally demands.

Have a GREAT time! Scotland is GREAT! More rainbows than you'll ever see!!!

But my experience overall has been that buying tickets too early or too late usually results in higher prices. The sweet spot seems to be about 3-4 weeks out.

now I have a time frame to reference......

For international, you start looking right away but don't buy before 3 1/2 months out. I just bought tickets for Germany at the end of May, and they have been rising ever since.

By the way, be sure to to to Icelandair and compare prices with the others. They are often the cheapest and are not included in sites like Orbitz or Kayak.

The most expensive day to buy tickets is 1 day before travel.

The second most expensive day is 2 days before travel.

The third most expensive day is 3 days before travel.

We are planning on travel to London on June 20. April 1 is my "magic" day.

There are several good analyses of travel purchase days available on-line. I may have one or two bookmarked - I will check.