Trainline has said the US standoff with Iran is hitting its revenues, with rail ticket sales to foreign visitors to Europe affected.

The UK-based international ticketing agent said it expected revenues to stay flat or decline over the coming year, citing “the effects of geopolitical tensions in the Middle East on inbound air traffic into Europe”.

Airlines have reported later bookings, with considerable consumer uncertainty around summer travel plans. The US-Israel war on Iran, closure of the strait of Hormuz and subsequent blockades have raised doubts about global jet fuel supply, with carriers already beginning to cancel thousands of flights.

Shares in the company fell on its earnings guidance, with Middle East tensions adding to Trainline’s prior warnings of headwinds, including UK ticketing policy.

The British government has frozen rail fares and indicated it would set up its own ticketing website under the planned Great British Railways, while the expansion of contactless payments around London and other cities is likely to further eat into Trainline’s business.

The group, whose primary revenues remain UK-based, reported full-year operating profits up 43% to £122m, with revenue up by 2% to £453m for 2025-26.

However, it said it now expected sales of just £440m-£455m in 2026-27.

Trainline said it remained Europe’s most downloaded rail app and is targeting further growth in Italy and France, where greater competition among operators on long-distance routes is expanding the ticketing market.

Jody Ford, the outgoing chief executive of Trainline, said it had been “a year of strong delivery with record net ticket sales and revenue, and continued double-digit growth in profitability”.

He added: “Ahead of the creation of GBR online retail in the UK, we are working closely with government to deliver on its commitment to deliver a fair and open regulatory framework. We strongly welcome the recent decision to open delay repay to independent retailers, our customers’ No 1 ask.”

Trainline shares dropped by about 8% in early trading but recovered to close about 1% lower.