It’s widely thought that the day before Thanksgiving or the Sunday after is the busiest travel day of the year. But figures from some of the biggest U.S. airports say it’s summer weekends that are the busiest. Even so, there will still be a lot of people traveling in the next few days. Most will be driving to visit friends and relatives for the festive meal tomorrow. But for those who live too far away, getting on an airliner is often the only choice. There are more than 3,000 companies providing scheduled air transportation across the country — services worth more than $133 billion annually. You can find current data on the country’s economy — on the go — by downloading the new “America’s Economy” mobile application at <www.census.gov/mobile>.