U.S. Gasoline Prices Poised for Sharp Rise as Strait of Hormuz Blockade Sends Oil Toward $100

American drivers are bracing for another spike at the pump this week, as crude oil prices surged back toward the $100-per-barrel threshold following a major geopolitical escalation in the Middle East.

According to data from AAA, the national average price for a gallon of regular gasoline stood at $4.12 on Monday, a jump of more than 50 cents from just one month ago. The upward pressure is expected to intensify in the coming days.

The sudden market shift comes after former President Donald Trump announced over the weekend that the U.S. would move to blockade the Strait of Hormuz, a vital maritime passage for global oil shipments. The decision followed the collapse of negotiations between Washington and Tehran.

"We are likely to see gasoline prices jump again this week, with diesel following suit," said Patrick De Haan, head of petroleum analysis at GasBuddy. "This will continue until there is a meaningful restoration of shipping traffic through the Strait. The wholesale market is already reacting." Indeed, gasoline futures rose 3% on Monday, signaling higher costs for retailers imminently.

In a social media statement, Trump directed the U.S. Navy to begin "BLOCKADING any and all Ships" entering or leaving the strait, aiming to cut off Iran's primary oil export route and end its practice of demanding tolls from vessels.

The immediate impact was felt in oil markets. The U.S. crude benchmark, West Texas Intermediate, surged to hover near $100 per barrel, while the international Brent benchmark also traded around the same level. Analysts warn the situation could deteriorate rapidly.

"Signs are emerging that the global oil system may be coming under increasing strain," wrote a team of JPMorgan analysts led by Natasha Kaneva. They noted that European and Asian refiners are now competing aggressively for available cargoes, driving physical spot prices for Brent to record highs. Dated Brent was assessed at $126 per barrel late last week, after hitting $144 earlier this month.

Historically, the price difference between physical barrels and futures contracts is modest, often just a dollar or two. "Today’s much wider gap signals a market struggling to source barrels for delivery now, even if it still assumes supply will normalize later," Kaneva added. JPMorgan has previously warned that a prolonged shutdown of traffic through the strait could push the national average gasoline price in the U.S. to $5 per gallon.

Market Reactions & Analyst Commentary

Michael Chen, Portfolio Manager at Horizon Capital: "This is a textbook supply shock. The Strait handles about 20% of global oil trade. Even the threat of disruption sends markets into a frenzy. We're advising clients to expect sustained volatility in energy equities and at the pump for the foreseeable future."

Sarah Gibson, Small Business Owner (Transportation), Cleveland, OH: "It's devastating. My margins were already thin. A jump to $5 a gallon? That could put me and my drivers out of business. This isn't just a number on a screen; it's people's livelihoods. The administration needs to think about the economic fallout here at home, not just geopolitics."

Dr. Arjun Patel, Senior Fellow at the Global Energy Institute: "While the price reaction is acute, it also highlights a deeper, long-term vulnerability in global energy security. Over-reliance on this single chokepoint has been a known risk for decades. This crisis should accelerate investment in diversification and alternative energy infrastructure."

Lisa Moreno, Consumer Advocate: "It's an absolute outrage. Working families are already stretched to the breaking point with inflation, and now this? It feels like we're constantly paying for political maneuvers that have no direct benefit to the average American. Where is the relief? Where is the plan?"

Ines Ferre is a senior business reporter for Yahoo Finance. Follow her on X at @ines_ferre.

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