The Gulf is a major source of aviation fuel, accounting for about 50% of Europe's imports. The bulk of it comes through the Strait of Hormuz, which Iran has effectively closed in response to US and Israeli attacks.
Lufthansa said on Tuesday it would save roughly 40,000 metric tons of jet fuel through its flight cuts, the majority of which will come from the closure of its CityLine service.
It said this means it will temporarily stop flying to and from Heringsdorf, Cork, Gdańsk, Ljubljana, Rijeka, Sibiu, Stuttgart, Trondheim, Tivat, and Wrocław.
The firm will either refund affected passengers or book them on to alternative flights with one of its other airlines – SWISS, Austrian Airlines, Brussels Airlines, and ITA Airways – where possible.
Some of the flight cuts could become permanent. Lufthansa said it was reviewing its whole European schedule and would release more details later in April.