The United States and Iran signed an agreement on June 18, 2026 [3], to end their ongoing war and reopen the Strait of Hormuz [2].

This deal is critical because it aims to stabilize the Middle East by restoring the flow of global shipping through one of the world's most vital maritime chokepoints. The resolution of hostilities between the two nations could prevent further escalation in a region already strained by conflict.

The path to the final agreement began with a tentative deal reported on May 28, 2026 [1]. Following that initial breakthrough, mediators held meetings on June 15, 2026 [2], to finalize the terms before the formal signing ceremony took place in Switzerland [2].

The agreement serves as a memorandum of understanding designed to extend the current cease-fire and ensure the safe passage of vessels through the Strait of Hormuz [2]. While some early reports indicated the deal was pending final approval from President Donald Trump (R-WY) [1], later reports confirmed that both he and Iranian President Masoud Pezeshkian signed a copy of the agreement on June 18, 2026 [3].

Former Pakistani ambassador Jamil Ahmed Khan said the move toward regional stability is significant. The agreement seeks to end military conflict and prevent the economic disruption caused by the closure of the strait [2].

The transition from a tentative framework in May to a signed document in June suggests a rapid acceleration of diplomatic efforts. The use of Switzerland as a neutral ground for the signing follows a long tradition of European mediation in U.S.-Iran relations [2].

“The United States and Iran signed an agreement on June 18, 2026, to end their ongoing war.”

The reopening of the Strait of Hormuz removes a primary trigger for global oil price volatility and reduces the immediate risk of a full-scale naval war. By moving from a tentative agreement to a signed memorandum, the U.S. and Iran have established a fragile but formal diplomatic channel that prioritizes economic stability over military confrontation.