A sign shows the price of gas at a store, Tuesday, March 31, 2026, in Freeport, Maine. (AP Photo/Robert F. Bukaty)

NEW YORK (AP) — U.S. gas prices jumped past an average of $4 a gallon for the first time since 2022 on Tuesday, as the Iran war pushes fuel prices higher worldwide.

According to motor club AAA, the national average for a gallon of regular gasoline is now $4.02 — over a dollar more expensive than before the war began. The last time U.S. drivers were collectively paying this much at the pump was nearly four years ago, following Russia’s invasion of Ukraine.

The price is a national average, meaning drivers in some states have been paying well over $4 a gallon for a while now. Prices vary between states due to factors ranging from nearby supply to differing tax rates.

Since the U.S. and Israel launched the joint war against Iran on Feb. 28, the cost of crude oil — the main ingredient in gasoline — has spiked and swung rapidly. That’s because the conflict has caused deep supply chain disruptions and cuts from major oil producers across the Middle East. Both Brent crude, the international standard, and benchmark U.S. crude are now going for more than $100 per barrel, up from roughly $70 before the war.

Motorists around the world are coping with higher gas prices. In Paris, for example, gas is at 2.34 euros per liter ($2.68), which is about $10.27 a gallon.

Expensive gas could drag on the economy and drive up other prices

Higher gas prices are impacting consumers and businesses as many households continue to face wider cost of living strains. As drivers pay more to cover necessities like gas, or even utility bills impacted by soaring fuel costs, many may be forced to cut their budgets in other places. That threatens broader consequences for the economy overall.

Before launching the war, President Donald Trump bragged about keeping gas prices low. Consumer prices and the cost of living already have become flashpoints in this midterm election year. A recent AP-NORC poll found that 45% of U.S. adults are “extremely” or “very” concerned about being able to afford gas in the next few months, up from 30% shortly after Trump won the 2024 presidential election with promises to lower costs.

Beyond visits to the pump, analysts say high fuel costs will trickle into groceries, which have to be restocked frequently and could also see price hikes as businesses’ transportation and packaging costs pile up. Other cargo has also been impacted. The U.S. Postal Service is seeking a temporary 8% added charge on some of its popular products including Priority Mail.

U.S. diesel, used for many freight and delivery trucks, is now going for an average of $5.45 a gallon, up from about $3.76 a gallon before the war began per AAA.

“It’s going to mean more expensive bills for truckers, tractors and trains that move the U.S. economy with diesel fuel. It’s going to mean consumers are likely greeted by rising grocery prices — and broadly speaking, a rise in U.S. inflation,” said Patrick De Haan, head of petroleum analysis at fuel-tracking service GasBuddy.

It’s possible those prices could jump even higher. To Trump’s frustration, most tanker movement in the key Strait of Hormuz — where roughly one-fifth of the world’s oil once sailed through — remains at a halt. That’s led to cuts from producers in the region who have no way of getting their crude to market. Meanwhile, Iran, Israel and the U.S. have all struck oil and gas facilities, worsening supply concerns.

Analysts like De Haan reiterate that all eyes are on the Strait of Hormuz — noting that if the waterway remains blocked for long enough, the U.S. average price for gasoline could climb toward $4.50 a gallon, or even approach the record $5 mark hit in 2022.

Drivers feel the pinch

“I think it’s outrageous,” Kelly Gravlin said of gas prices while filling up her Toyota Forerunner at a Costco in Commerce Township, northwest of Detroit. She paid about $3.95 per gallon for regular unleaded on Tuesday, with a final cost of $70.73.

“We’re in a war that we shouldn’t be in that’s, therefore, hiking up our prices,” said Gravlin. “From a president who ran on getting gas prices low.”

Many drivers are on the hunt for cheaper prices where they can find them. Danielle Ervin, of Novi, Michigan, stopped at a local Speedway station Tuesday morning because it offers an 11 cent per gallon discount.