Spain's Prime Minister Pedro Sanchez, right, greets Mexican President Claudia Sheinbaum at the Meeting in Defence of Democracy summit in Barcelona, Spain, Saturday, April 18, 2026. (AP Photo/Joan Monfort)

U.S. Sen. Chris Murphy, D-Conn., delivers a speech at the Global Progressive Mobilisation summit in Barcelona, Spain, Saturday, April 18, 2026. (AP Photo/Joan Monfort)

Spain's Prime Minister Pedro Sanchez, left, embraces Brazil's President Luiz Inacio Lula da Silva at the end of the Global Progressive Mobilisation summit in Barcelona, Spain, Saturday, April 18, 2026. (AP Photo/Joan Monfort)

FILE - Workers refuel an Airbus A350 with sustainable aviation fuel at Roissy airport, north of Paris, Tuesday, May 18, 2021. (AP Photo/Christophe Ena, File)

The price of jet fuel has surged since the start of the Iran war. (AP Digital Embed)

FILE - A worker prepares to fuel a United Express aircraft after it arrived at a gate at Dallas-Fort Worth International Airport, Thursday, Jan. 15, 2015, in Grapevine, Texas. (AP Photo/Tony Gutierrez, File)

A Philippine Airlines plane takes off from Los Angeles International Airport in El Segundo, Calif., on Friday, April 17, 2026. (AP Photo/Damian Dovarganes)

A bulk carrier ship anchored in the Strait of Hormuz, Saturday, April 18, 2026. (AP Photo)