2 of the world's biggest airlines say they'll reject new planes if Trump's tariffs push up prices

• Ryanair's CEO said tariffs would mean "there's every likelihood we may delay" aircraft deliveries.
• Michael O'Leary added that he hoped "common sense will prevail."
• It comes after Delta Air Lines' CEO also said he would delay receiving any tariffed planes.

Europe's biggest airline joined Delta in saying it is ready to delay plane deliveries if Donald Trump's trade war makes them more expensive.

"If tariffs are imposed on those aircraft, there's every likelihood we may delay the delivery," Ryanair CEO Michael O'Leary told the Financial Times in comments published Tuesday.

"We might delay them and hope that common sense will prevail," he added.

The Irish budget carrier exclusively uses Boeing 737s, of which it has around 600.

O'Leary told the FT that Ryanair is set to receive another 25 Boeing planes from August, but the airline's schedule means it doesn't necessarily need these until March or April next year.

His comments come less than a week after Delta CEO Ed Bastian said the same about coming deliveries of planes from Boeing's rival, Airbus.

Bastian said on an earnings call that Delta would not accept cost increases on 34 new Airbus jets it expects to be delivered before the end of the year.

"One thing you need to know we're very clear on is that we will not be paying tariffs on any aircraft deliveries," he told investors.

"We will defer any deliveries that have a tariff on it," he added.

The European Union last week suspended retaliatory tariffs of 25% on certain US goods in hopes of negotiations.

However, both Boeing and Airbus planes could still face price increases because the aviation sector has a worldwide supply chain. One-fifth of Boeing's production materials are imported, CEO Kelly Ortberg told a Senate hearing earlier this month.

Trump has imposed 10% tariffs on all imports other than from China, which faces a higher rate, and 20% on steel and aluminum — key materials for planes.