If you're someone who jumps the border to fill up, take note.
Gas prices in the U.S. are the highest for this time of year in four years.
AAA reports the national average for regular is $2.87 a gallon.
That's the highest for late September since 2014.
Gas prices typically fall after the summer travel season ends but AAA says prices aren't falling very much or very fast this year.
A spike in crude oil prices is being cited as one reason for the increase.
With files from MetroSource