As the summer travel season officially kicks off this weekend, Adobe's Digital Index research service has published new data on where Americans are traveling, when, and how much they'll spend.
The study, which surveyed 1,000 U.S. travel customers and analyzed billions of data points from online travel agency bookings, found that Americans will spend $65 billion on summer travel this year, up 7% from last year. That translates to an average of $2,788 per traveler.
The Adobe study also looked at which weekends were the most expensive, with Fourth of July ranking highest, followed by Labor Day and Memorial Day. And if you're booking travel for any of these holidays, the best deals can be found about 40 days beforehand for flights, and 90 days out for hotels.
So it's already much too late to get a good deal for Memorial Day—travelers booking now will be a 40% premium on flights and hotels. But here's what the study found about when to book for the big summer holiday weekends.