More than 103 million Americans—the most on record—are expected to travel for the year-end holidays, according to AAA.

This represents a 1.5 percent increase, or 1.5 million more people traveling, compared with last year. This comes despite one fewer travel day this holiday season. The year-end holiday travel period is defined as Dec. 23 to Jan. 2.

The increase in holiday travel this year is being driven by additional consumer spending, a result of improvements in the labor market and rising wages. Additionally, low gas prices and increased consumer optimism will prompt more Americans than ever to set out on road trips, take to the skies, or board trains, buses and cruise ships to celebrate the holidays.

The vast majority of travelers—93.6 million people—will take a holiday road trip, an increase of 1.5 percent over last year. Air travel is expected to increase by 2.5 percent, with more than 6 million Americans flying to their holiday destinations. Travel by other modes of transportation, including cruises, trains and buses, will decrease slightly, to 3.5 million travelers.