Iran War Oil Prices Spike as Strait of Hormuz Stays Closed

Oil Markets in Uncharted Territory

The Iran war oil prices connection has become impossible to ignore. With the Strait of Hormuz—the passageway for roughly one-fifth of the world’s oil production—effectively closed since late February, global energy markets are experiencing their biggest supply shock in decades. Goldman Sachs has described the disruption as the largest energy supply crisis in history, estimating that roughly 17.6 million barrels per day of oil and LNG flows have been removed from global markets, as detailed in a Goldman Sachs report.

Brent crude spiked toward $120 per barrel in the early weeks of the conflict before settling in the low $100s, according to data from CNN. US gas prices surged past $4 per gallon in some regions, hitting levels not seen since 2022 and reigniting inflation fears across the economy. The Iran war oil prices connection means these costs could remain elevated for months.

How We Got Here: A Timeline of Economic Disruption

The economic shock began on February 28, when US-Israeli strikes on Iranian nuclear and military facilities triggered a swift Iranian response. Tehran effectively closed the Strait of Hormuz, halting the flow of oil tankers and LNG carriers through the narrow waterway between the Persian Gulf and the Gulf of Oman.

CNN reported that even before the strikes, oil markets were pricing in risk, with Brent crude rising above $70 and US crude gaining about $10 over the preceding month. After the conflict began, the disruption accelerated rapidly. By March, the US Navy had implemented a maritime blockade, diverting and inspecting vessels bound for Iranian ports. Iran responded by attacking shipping and threatening any vessel attempting to transit without permission.

According to the Congressional Research Service via EveryCRSReport, the Strait handles approximately 27% of global crude oil and petroleum product trade and about 20% of liquefied natural gas trade. Asian economies have been hit hardest—China, India, Japan, and South Korea depend heavily on Gulf oil transiting through Hormuz and now face sharply higher energy costs.

Gas Prices and Inflation at Home

For Americans, the Iran war oil prices connection has been most visible at the pump. The US national average for regular unleaded gas hit approximately $4.08 per gallon at its peak, according to CNBC. The surge in energy costs has pushed overall CPI up 0.9% in March alone, with year-over-year inflation reaching 3.3%. Core inflation remains elevated at 2.6% annually, putting the Federal Reserve in a difficult position.

Higher energy costs are starting to dampen consumer spending and could delay interest rate cuts that markets had been hoping for. The full impact on pump prices lags crude oil prices by about six weeks because of the time needed to refine crude into gasoline, meaning additional price increases may still be working their way through the system.

Global Ripple Effects

The economic damage extends well beyond oil. European natural gas prices have surged by approximately 63% since the conflict began, and Asian spot LNG prices are up about 54%, according to the Congressional Research Service analysis. Europe now faces recession risks as sustained higher energy prices squeeze households and businesses.

China is under particular strain. The end of discounted Iranian crude has added pressure to an economy already dealing with a real estate downturn and US tariffs. According to Bloomberg, the war threatens to derail the global economic recovery entirely, with the IMF warning of broader spillover effects if the conflict drags on. For more context on the diplomatic situation, read our coverage on how the Iran US ceasefire is holding.

Can Iran Outlast the Blockade?

One of the key questions for markets is how long the standoff can continue. According to Al Jazeera, Iran has maintained oil exports of roughly 1.7 to 1.84 million barrels per day despite the blockade, with Iranian crude blends frequently trading above $90 and often above $100 per barrel. Iran is stockpiling unsold oil, which could tighten available storage and influence future market dynamics.

Iran has also signaled it will unveil a formal toll mechanism for vessels passing through the Strait of Hormuz, according to Al Jazeera, effectively attempting to monetize control of the waterway even as the broader conflict continues. This could create a new revenue stream for Tehran while further tightening global supply chains.

The Bottom Line

The Iran war oil prices story is still being written. Goldman Sachs estimates Brent crude could reach or exceed prior all-time highs if the disruption persists, and European gas prices could double if the Strait remains closed for more than two months. For ordinary people, this means higher prices at the pump, more expensive heating bills, and a global economic recovery that is running out of runway.

With talks stalled and the ceasefire fragile, markets are pricing in a prolonged disruption. Whether through diplomacy or escalation, the path to lower energy prices runs through the Strait of Hormuz—and for now, that path remains firmly closed.