Sojern, a data-driven traveler engagement platform, recently released an analysis of the top U.S. summer travel trends for the months of June, July and August. Obtained through Sojern’s partnerships with travel brands, the findings consist of more than 520 million traveler data points.

In the months of June, July and August, leisure accounted for 57% of U.S. travel, compared to 52% in Q2 and 43% in Q1 2013, says Sojern.

Leisure travel indicators include longer trip duration, increased booking lead time and multiple people in a travel party. This summer, 44% of travelers stayed at their destination for six days or longer, compared to 38% in Q2 and 36% in Q1, according to Sojern. And 62% of travelers searched for vacations with durations longer than six days, compared to 55% in Q2.

The number of family trips (four or more people in a travel party) this summer doubled over both Q2 and summer 2012, according to Sojern. Orlando was one of the 10 most popular air travel destinations for the first time this year. And in July, top hotel searches included destinations, such as San Diego, Ocean City, N.J., Myrtle Beach, S.C., and Los Angeles.

In addition, Sojern’s data also showed that this summer’s travelers booked vacations further in advance of their desired travel date — 35% of travelers booked their trips more than 30 days in advance, compared to 24% in Q2 and 25% in summer 2012.