AAA says 3.7 million people will drive this holiday weekend. Another 400,000 will fly.
"This represents a 4.6 percent increase from last year," says Cynthia Harris with the auto club's northern California office. "Now, we have to remember these are projected numbers. But, normally, we see a slight increase from year-to-year. This year it really is significant and this is the highest increase since 2005."
Harris says the average cost of gas is $3.79 per gallon. That's about 35 cents cheaper than last year.
Airfares are cheaper as well -down two percent from last year.
But, rental car rates have increased by an average of $19 a day and hotel room rates have increased by an average of $12 a day.