Could an Iran–U.S. Crisis Disrupt LNG Markets Even Without a Crude Oil Shortage?

Yes. LNG markets can be disrupted even when crude oil remains adequately supplied. An Iran–U.S. crisis could affect gas shipments, shipping costs and buyers’ willingness to take risks without creating a global shortage of crude.

The critical connection is the Strait of Hormuz. Qatar, one of the world’s largest liquefied natural gas exporters, ships its LNG through this narrow passage. Iran does not need to be a major LNG exporter for a confrontation involving it to threaten gas supplies elsewhere.

How a disruption could spread

• Shipping becomes more difficult before the passage actually closes. Attacks, threats to vessels or restrictions on navigation could raise war-risk insurance costs, discourage shipowners or delay departures. For Qatari LNG loaded inside the Gulf, sailing around Africa is not an alternative way out: vessels must first pass through Hormuz.
• Buyers compete for replacement cargoes. If Qatari shipments become uncertain, importers may seek cargoes from the United States, Australia or other suppliers. That can intensify competition between Europe and Asia and lift spot LNG prices, including for destinations that buy little Qatari gas directly.
• Replacement supply is not instantly available. LNG liquefaction capacity limits how quickly exporters can increase deliveries. Spare natural gas production alone is not enough; the gas must be processed, liquefied, loaded and transported.
• Uncertainty can move prices before deliveries fall. Traders and utilities may bid more for prompt cargoes or secure supplies early. A price spike can therefore reflect a perceived threat rather than an established physical shortage.

Why adequate crude supplies would not prevent it

Oil and LNG have different supply chains and buffers. Crude inventories, spare oil production and some routes that bypass Hormuz could help cushion oil markets, depending on the scale of the disruption. Those measures cannot replace a delayed LNG cargo. Gas buyers instead depend on available gas storage, pipeline imports, alternative LNG supplies and, where feasible, fuel switching.

Some long-term LNG contracts are linked to oil prices, but that does not make the two markets move together in every crisis. Spot gas prices can jump while crude prices remain comparatively stable. A contract’s pricing formula also cannot guarantee physical delivery through an unsafe shipping route.

The severity would depend on the disruption’s duration and the condition of gas markets at the time. High storage levels, mild weather and available alternative cargoes would soften the impact. Low inventories, peak heating or cooling demand, or outages at other export plants would make the same shipping interruption more damaging.

So the key distinction is between market disruption and outright shortage. Higher freight costs, delayed cargoes and a sharp gas-price increase are possible without a crude oil shortage—and without a complete closure of Hormuz. An Iran–U.S. crisis would not automatically produce those outcomes, but stable oil supplies would not rule them out.