Many children have gone back to school in the U.S., and the days are getting shorter, but there is still one more excuse to use the swimsuits and beach towels before packing them up: Labor Day .

Airports, highways, beaches and theme parks are expected to be packed for the long holiday weekend as a lot Americans mark the unofficial end of summer the same way they celebrated the season’s unofficial start: by traveling . The Transportation Security Administration anticipates screening more than 17 million people between Thursday and next Wednesday — a record for the Labor Day period. AAA says bookings for domestic travel are running 9% higher than last year for the holiday weekend, while international trips are down 4%.

American Airlines plans to have its largest Labor Day weekend operation ever and expects a 14% increase in passengers compared to last year. If you are traveling to get a last blast of summer, here is a rundown of what you need to know. Motorists are getting a break on gasoline compared with last year.

The nationwide average was recently $3.44 per gallon, compared to $3.86 a year ago, according to AAA.

For electric vehicles, the average price for a kilowatt of power at an L2 commercial charging station is about 34 cents. The average is under 25 cents in Kansas and Missouri but tops 40 cents in several states, including New Hampshire, Tennessee and Kentucky. Hawaii is the costliest, at 56 cents.

Average airfares in July were down 7.1% from June and 2.8% from J.