US gasoline price drops below $4 a gallon for first time since early Iran war
Falling oil prices tied to a potential US-Iran deal pushed the national average to $3.997, but drivers are still paying roughly 90 cents more than last year
For the first time since mid-April, American drivers are seeing a number below four on the pump. The national average retail gasoline price hit $3.997 per gallon on June 15, according to GasBuddy data, slipping just barely under a threshold that had become a stubborn ceiling since the Iran conflict rattled global energy markets.
How we got here
The backdrop to this price drop is a geopolitical one. Oil prices fell more than $4 per barrel in recent sessions as markets grew optimistic about a possible preliminary agreement between the US and Iran. The core hope: that a deal could facilitate reopening the Strait of Hormuz, the narrow waterway responsible for roughly one-fifth of global oil trade.
When the strait was effectively closed earlier this year due to escalating tensions, it choked a critical artery for international energy flows. Tanker traffic disruptions sent crude prices surging and dragged gasoline along for the ride. By late March, the national average had climbed to $4.02 per gallon.
Current gasoline prices remain approximately 90 cents per gallon higher than they were at this time last year. For a household filling a 15-gallon tank once a week, that translates to roughly $700 in additional annual fuel costs compared to twelve months ago.
The Strait of Hormuz factor
About one-fifth of all globally traded oil passes through this 21-mile-wide chokepoint between Iran and Oman. When tensions between the US and Iran escalated earlier this year, that bridge effectively closed. Oil tankers rerouted or sat idle. Supply tightened and prices rose sharply.
It is worth noting that nothing has been signed yet. Markets are trading on optimism, not ink. A single provocative incident in the Persian Gulf could reverse the current trend overnight.
The 90-cent year-over-year premium on gasoline also tells an important story about sticky inflation. Even with prices falling, consumers are measurably worse off than they were in mid-2025. The sub-$4 number feels like a milestone psychologically, but the war’s economic footprint is still very much visible at every gas station in the country.