Iran considered a retaliatory strike on a Ukrainian seaport following the downing of a Ukrainian airliner by Iran's military in January 2020. The incident, which resulted in the deaths of all 176 people aboard, including 82 Iranians, 57 Canadians, and 11 Ukrainians, sparked widespread condemnation and protests within Iran.

Information about Iran's contemplation of striking a Ukrainian seaport emerged through declassified U.S. intelligence. The intelligence indicated that Iran had been weighing options for retaliation after acknowledging it had mistakenly shot down the plane. The specific seaport was not identified in the reports.

A flurry of diplomatic efforts ensued in the wake of the incident, involving several countries. These diplomatic actions are credited with helping to de-escalate the situation and prevent a further widening of the conflict. U.S. officials stated that this diplomatic engagement was crucial in easing tensions that had escalated dramatically following the tragic downing of the aircraft.