Gas prices on the rise heading toward Memorial Day weekend

Last Updated: Tuesday, May 19, 2015, 3:29 PM EDT

Look for higher gas prices if you're hitting the road for Memorial Day weekend.

Prices have been on a slow but steady climb since February. The average national price of a regular gallon of gasoline has jumped 22 cents in the past three weeks to $2.80.

Even so, gas is about 93 cents a gallon cheaper than it was a year ago.

According to AAA, some of the factors pushing prices higher are more demand from drivers, a bump in crude oil prices, the dollar slowing its strength versus foreign currencies and an anticipated increase in oil demand from China.

"The good news for the holiday weekend and for most of the summer is that prices are going to be the lowest they've been in five years," said Nancy White, a spokesperson for AAA.

It's not just that the roadways will be busy this summer. The Industry group Airlines for America said it expects a record 222 million passengers to fly between June 1 and Aug. 31.

Analysts say gasoline price hikes will likely slow or stop because of an expected increase in supplies.