German airline giant Lufthansa is scaling back its operations in response to skyrocketing fuel prices. Following the closure of its regional subsidiary CityLine, the airline group is canceling thousands of flights to achieve a reduction of 40,000 tons of kerosene, the company announced in Frankfurt.

With the price of jet fuel doubling since the outbreak of the U.S. and Israeli war against Iran, there are reports that Europe’s supply of jet fuel is down to only weeks if the Strait of Hormuz is not opened. The continent receives between 50 and 75 percent of its jet fuel from countries that must transit fuel via the strait, leaving Europe’s airline industry especially vulnerable due.

With Lufthansa’s adjustments, the number of uneconomical short-haul flights would decrease. Lufthansa’s offerings are to be optimized over the summer via the six hubs in Frankfurt, Munich, Zurich, Vienna, Brussels, and Rome. Passengers would thus continue to have access to the global route network, assuming the crisis does not worsen.

The first 120 daily flight cancellations, effective until the end of May, were implemented on Monday, according to Lufthansa. The passengers concerned have been informed.

The routes from Frankfurt to Bydgoszcz and Rzeszow in Poland and Stavanger in Norway are temporarily cancelled. Ten connections within the group are to run via other airports. Those affected are Heringsdorf, Cork, Gdansk, Ljubljana, Rijeka, Sibiu, Stuttgart, Trondheim, Tivat, and Wroclaw.

Lufthansa is also revising its medium-term route planning in view of the reduction in its capacity. Details are expected to be published at the end of April and beginning of May. The group expects a “largely stable fuel supply” for the flights now planned in the summer flight schedule.