Here’s Why IAG Shares Declined Today

Shares of International Consolidated Airlines Group (LON:IAG), the parent of British Airways, Iberia and Aer Lingus, tumbled sharply on Wednesday, July 8, 2026, after renewed military strikes between the United States and Iran sent oil prices higher and reignited fears over airline fuel costs.

IAG stock fell roughly 4.8% to close around 454.9p, down from Tuesday’s 477.6p close, making it one of the worst performers on the FTSE 100.

London stocks opened lower after news broke overnight that the US and Iran had exchanged strikes, shattering hopes that the fragile ceasefire agreement would hold.

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President Donald Trump added to the unease with comments suggesting the terms of an MoU with Iran had unraveled, further stoking fears of escalation around the Strait of Hormuz — a critical corridor for global oil and jet fuel shipments.

Brent crude surged over 8% to above $80 a barrel on the news, with West Texas Intermediate rising a similar amount to near $76. While the rally lifted energy majors BP and Shell, it hit airline and leisure stocks hard, as investors priced in higher fuel costs and the risk of flight disruptions.

The FTSE 100 slid about 1.3% and the FTSE 250 dropped 1.8% in the broader selloff.

IAG is particularly sensitive to this dynamic. The group already lifted its 2026 fuel bill estimate to roughly €9bn earlier this year amid a prior bout of Iran-linked oil volatility, and warned that a prolonged closure of Middle East supply routes could squeeze jet fuel availability globally.

With the conflict flaring again, investors are bracing for further cost pressure and demand disruption just as IAG heads toward its next round of results.