The Indian-flagged VLCC Lila Vadinar, carrying 2 million barrels of Kuwaiti crude, was among at least four oil and gas tankers that reversed course after attacks on vessels near the Strait of Hormuz.
The diversions came as US President Donald Trump declared the ceasefire with Iran was effectively "over".
It triggering a fresh spike in oil prices over fears of prolonged disruption to one of the world's most critical energy shipping routes.