SEOUL/WASHINGTON — U.S. President Donald Trump wants South Korea to help finance one of America’s biggest proposed energy projects, but Seoul is refusing to write the check until it knows whether the numbers actually make sense.
At the center of the dispute is Alaska LNG, a long-delayed project that would move natural gas from Alaska’s North Slope through an enormous pipeline to a liquefaction terminal in Nikiski, where the fuel could then be shipped directly to Asian buyers.
Trump announced that South Korea’s broader U.S. investment package would include about $54 billion for the Alaska LNG pipeline and related infrastructure.
But South Korean officials quickly pushed back.
Seoul says participation in the project has not been finalized and will depend on a full review of its commercial viability, profitability and legal conditions.
That distinction is crucial.
South Korea may want more secure American energy supplies.
But it does not necessarily want to finance one of the most expensive LNG projects ever proposed.
Alaska LNG Could Cost Up to $54.5 Billion
The project is enormous.
Developer Glenfarne Group estimates Alaska LNG could cost between $44.5 billion and $54.5 billion.
It would include an approximately 800-mile, or 1,300-kilometer, pipeline running from Alaska’s North Slope to the southern port of Nikiski, along with gas-treatment facilities and a major LNG export terminal.
The planned export capacity is around 20 million metric tons of LNG per year.
Glenfarne owns 75% of the project, while the state-owned Alaska Gasline Development Corporation holds the remaining 25%.
Developers are targeting a final investment decision on the pipeline in 2026 and the export terminal in 2027, with first LNG shipments targeted for 2031.
But those dates have already slipped from earlier targets.
The Biggest Problem Is Cost
The reason Seoul is cautious becomes clearer when Alaska LNG is compared with competing American projects.
Reuters estimates the project could cost around $2.2 billion to $2.7 billion for every million metric tons of annual LNG capacity.
That is more than twice the roughly $1 billion per million tons seen at some recent U.S. Gulf Coast LNG developments.
In other words, Alaska LNG could be dramatically more expensive to build than competing facilities.
The pipeline itself is one of the biggest reasons.
Unlike Gulf Coast projects that can tap into extensive existing natural-gas networks, Alaska LNG must move gas hundreds of miles through difficult terrain before it can even reach the export terminal.
Estimates put the pipeline portion alone at around $13.2 billion to $16.9 billion.
And large infrastructure projects have a well-known tendency to exceed their initial budgets.
That creates the central question facing South Korea:
Will cheaper shipping to Asia compensate for vastly higher construction costs?
Alaska Has One Big Advantage: Location
Supporters say Alaska LNG has something Gulf Coast exporters do not.
Geography.
An LNG carrier leaving Alaska for South Korea, Japan or Taiwan has a much shorter journey than one sailing from the U.S. Gulf Coast.
Alaskan cargoes also avoid the Panama Canal and major Middle Eastern shipping chokepoints.
That argument has become more powerful during 2026.
War in the Middle East disrupted LNG flows through the Strait of Hormuz, highlighting the vulnerability of Asian countries that rely heavily on Gulf energy shipments.
Glenfarne executives argue Alaska LNG could therefore provide Asian buyers with something increasingly valuable:
energy security.
But analysts remain skeptical about whether Asian utilities will pay a large premium for that security.
One industry analyst told Reuters that there is still little evidence buyers are prepared to absorb substantially higher LNG prices simply because the gas comes from Alaska.
South Korea Has a Real Reason to Diversify
Seoul’s interest is not purely political.
South Korea remains one of the world’s biggest LNG importers and has been actively trying to reduce its dependence on Middle Eastern supply.
State-owned Korea Gas Corporation said in June that South Korea expected its reliance on the Middle East for LNG imports to fall below 18% in 2026, down from 45% in 2022 and 24% in 2025.
KOGAS estimates annual South Korean LNG demand at around 35 million tons.
The country has already diversified through projects such as LNG Canada, where KOGAS owns a 5% stake and has secured around 700,000 tons of LNG annually for 40 years.
That Canadian supply illustrates the dilemma Alaska faces.
South Korea can diversify away from the Middle East without necessarily choosing the most expensive project available.
Canada May Be Alaska’s Toughest Competitor
Canadian LNG projects enjoy many of the same geographic advantages as Alaska.
They are positioned on the Pacific coast, allowing cargoes to reach Asian buyers without traveling through the Panama Canal or Strait of Hormuz.
But many industry observers regard some Canadian developments as commercially less risky.
That makes Canada a potentially serious competitor for South Korean, Japanese and Taiwanese buyers looking to secure Pacific LNG supplies.
For Alaska LNG to compete, developers may therefore need to prove that its shipping advantage outweighs its extraordinary upfront construction bill.
Trump Says South Korea Is In — Seoul Says Not Yet
The political tension intensified after Trump unveiled a broader package of up to $200 billion in South Korean strategic investments in the United States.
He said the package would include Alaska LNG, nuclear power plants and a massive gas-fired power project in Texas.
But South Korean officials immediately emphasized that Alaska LNG remained under review.
Trump later defended the announcement, saying he had not “jumped the gun.”
Seoul maintained that no final decision had been made.
The disagreement highlights a larger issue with the U.S.-South Korea investment framework.
South Korea previously agreed to a $350 billion strategic investment package tied to a trade arrangement with Washington.
About $150 billion was earmarked for shipbuilding, while roughly $200 billion was designated for other strategic U.S. investments.
But Korean lawmakers have questioned how those investments will be chosen — and whether taxpayers and companies in South Korea will receive sufficient returns.
Korean Lawmakers Are Asking Who Takes the Risk
South Korean politicians are particularly concerned about situations where Seoul provides most of the capital but the financial rewards are shared with American partners.
Lawmakers have said projects must deliver clear commercial benefits for South Korean companies and strengthen the country’s energy security rather than simply fulfilling political commitments to Washington.
The skepticism is especially strong around Alaska LNG because the project has been discussed for decades without reaching construction.
South Korea’s industry minister previously described it as a high-risk business, according to Reuters.
That history makes Seoul reluctant to transform a diplomatic promise into a multibillion-dollar financial commitment before the economics are proven.
The Project Still Needs More Binding Customers
Another major obstacle is financing.
Glenfarne says it has lined up preliminary commitments covering about 13 million tons of LNG per year from buyers in Japan, South Korea, Taiwan, Thailand and elsewhere.
But the project needs commitments covering roughly 16 million tons per year, or 80% of its planned export capacity, to help secure financing.
Even more importantly, many of the existing agreements are non-binding.
That means potential buyers have expressed interest without necessarily agreeing to purchase LNG under enforceable long-term contracts.
Japan’s JERA and Tokyo Gas have signed preliminary agreements covering a combined 2 million tons annually.
But developers still need more customers — and they must convert preliminary deals into binding contracts.
Without those contracts, lenders may be unwilling to finance a project costing more than $40 billion.
South Korea’s LNG Demand May Not Keep Rising Forever
There is another strategic issue.
Asia remains the world’s largest LNG market, but demand is not guaranteed to rise continuously.
Reuters reported that Asian LNG demand is expected to decline for a second consecutive year in 2026, partly because high prices have encouraged countries including South Korea and Japan to use more nuclear power, coal and renewable energy.
South Korea is itself expanding renewable energy while reconsidering a larger role for nuclear power as electricity demand from AI and data centers rises.
That creates another question.
If South Korea expects future electricity growth to be met increasingly by nuclear and renewable generation, how much additional LNG will it actually need when Alaska LNG starts exporting around 2031?
A project this expensive needs buyers not just today, but for decades.
The Middle East Crisis Strengthens Alaska’s Case
Still, the geopolitical argument should not be underestimated.
The disruption of LNG traffic through the Strait of Hormuz exposed one of Asia’s biggest energy vulnerabilities.
Before the crisis, the strait handled a significant share of global LNG trade.
South Korea, Japan, China and other Asian economies were highly exposed to disruptions because Qatar is one of the world’s largest LNG exporters.
That experience has increased interest in supplies that avoid the Middle East entirely.
Alaskan LNG would travel directly across the Pacific.
No Hormuz.
No Suez Canal.
No Panama Canal.
For governments worried about geopolitical shocks, that route has strategic value.
The unresolved question is how much they are willing to pay for it.
Trump Needs Asian Money to Make Alaska LNG Work
Trump has repeatedly promoted Alaska LNG as an important part of his U.S. energy strategy.
But political backing cannot replace project financing.
The development requires tens of billions of dollars, long-term buyers and highly complex construction across Alaska.
A major South Korean commitment could significantly improve the project’s credibility and potentially help attract additional investors.
That may explain why Washington is pushing Seoul so hard.
South Korea, however, has leverage.
Its government and companies are among the most important potential customers and financiers in the Asian LNG market.
And Seoul appears determined to use that leverage rather than sign simply because Washington wants a deal.
A $54 Billion Test of the U.S.-South Korea Alliance
The Alaska LNG debate is therefore becoming about much more than natural gas.
It is also a test of how the Trump administration’s investment agreements with major Asian allies will work in practice.
Washington wants enormous amounts of foreign capital flowing into U.S. infrastructure.
Seoul wants tariff relief, energy security and business opportunities for Korean companies.
Those goals can overlap.
But they are not identical.
Alaska LNG demonstrates exactly where they can collide.
South Korea may ultimately decide that direct access to politically secure U.S. gas justifies taking part.
Or it may conclude that Canadian LNG, Gulf Coast supplies, nuclear power and renewables offer better economics.
The project’s future may therefore depend on whether Washington can answer one question Seoul keeps asking:
Is Alaska LNG a commercially sound investment — or an extraordinarily expensive political project that South Korea is being asked to help finance?
