The airline group which also includes budget airline Transavia said it now expects to expand capacity by 2% to 4% this year, down from its earlier forecast of 3% to 5%.

Air France-KLM announced a net loss of €252 million (US$294 million) in the first quarter (Q1), an increase of 1% from the same period last year.

“While fuel price increases are not yet reflected in the results we present today, they are expected to weigh on the coming quarters,” said chief executive Benjamin Smith.

The war triggered by US and Israeli attacks on Iran at the end of February has nearly halted shipping traffic via the Strait of Hormuz, through which around a fifth of the world’s oil normally passes.

Jet fuel prices more than doubled in the first few weeks of the war.

Air France-KLM, like many other European airlines, tries to cushion the impact of price swings by locking in supplies in advance, and said didn’t feel the impact in March.

Despite this the airline group said it expects to add €2.4 billion to its annual fuel costs, with 1.1 billion in this quarter.

Like other airline groups, Air France-KLM said it had increased fare prices to compensate.

Air France, KLM and Transavia have relatively little exposure to the Middle East, where disruptions due to air travel were the most severe.

The group said other markets held up well.

Revenues rose by 4.4% to nearly €7.5 billion during the quarter, just beating analyst expectations compiled by financial data provider Factset.

It carried 22.3 million passengers, an increase of 2.3% and increased seat occupancy by 0.3 percentage points to 86.3%.

Shares in Air France-KLM rose 1.3% in morning trading in Paris while the blue-chip CAC 40 index was down 1.1% overall.