US government war on Iran to drive fuel prices higher, analysts warn

The military conflict between the US, Israel, and Iran that began on February 28, 2026, has done exactly what energy analysts feared it would: send fuel prices into orbit. Gasoline has surged more than 50% from its pre-war average of about $2.98 per gallon, while diesel has climbed over 60% year-over-year to record territory near $6.27 per gallon.

According to estimates from Brown University, American consumers have collectively spent more than $100 billion extra on gasoline and diesel from the outbreak of hostilities through September 2026. That works out to roughly $780 per household.

The Strait of Hormuz problem

The Strait of Hormuz, a chokepoint between Iran and the Arabian Peninsula, handles about 20% of the world’s oil supply on any given day. When military operations disrupted transit through that corridor, the math got ugly quickly.

At peak disruption, an estimated 11 to 14 million barrels per day were effectively removed from global markets. For context, the entire US consumes roughly 20 million barrels per day.

Reduced Middle Eastern crude availability forced refiners to scramble for alternative sources at higher prices. Refining operations shifted to prioritize diesel and jet fuel over gasoline, a decision driven by military and commercial logistics needs that left consumer gasoline supply even tighter.

Pre-war, the national average for regular gasoline sat comfortably below $3 per gallon. By the time prices peaked, Americans were staring at pump displays showing $4.50 or more. Diesel hit records near $6.27 per gallon.

A brief exhale, then more pain

A June interim ceasefire offered a moment of respite. Prices stabilized briefly as markets priced in the possibility of a resolution. That optimism proved premature.

Escalating tensions and intermittent strikes through the summer eroded inventory levels and depleted strategic stocks. By September 2026, gasoline prices were hovering between $4.15 and $4.50 per gallon. Diesel remained stubbornly elevated at or above $5.90.

The Brown University analysis broke down the consumer impact further. Of the $100 billion in excess fuel spending, roughly $55 to $59 billion came from gasoline alone.

The long road back to normal

Even in optimistic scenarios, market experts project that pre-war price levels may not return until 2027. That timeline assumes a full resolution of hostilities, which remains uncertain amid fragile ceasefires and renewed strikes.

The $780 per household figure from Brown University has become a frequently cited data point in domestic political debates, putting pressure on policymakers to find solutions that the underlying supply situation may not support.

Analysts tracking the situation suggest that even a full cessation of hostilities would take six to twelve months to meaningfully move prices lower, given the scale of supply disruption and the time required to rebuild inventory buffers. The 11 to 14 million barrels per day that were removed from markets at peak disruption represent a deficit that cannot be erased overnight, regardless of what happens diplomatically.