The cancellations, largely announced days or weeks in advance rather than at the last minute, come as carriers adjust schedules to manage higher operating costs. Lufthansa Group said it would cut around 20,000 short-haul flights across its network through October, reflecting broader industry pressures.

The timing coincides with a seasonal surge in travel demand and major global events such as the FIFA World Cup, increasing pressure on airlines and airport capacity. Eric Napoli, chief legal officer at AirHelp, said the disruption adds complexity for passengers navigating varying compensation rules and rebooking options.

Airlines typically offer affected passengers a choice between a refund or rebooking on the next available flight, though the scope of rights depends on the jurisdiction. In the United States, passengers are entitled to a full refund if they choose not to travel following a cancellation, regardless of the cause.

Internationally, protections differ significantly. The Montreal Convention governs airline liability across more than 140 countries, while regional frameworks in the European Union and the United Kingdom provide stronger protections, including compensation in certain cases and a “duty of care” requiring airlines to assist passengers during disruptions.

In contrast, protections in the United States, Canada and parts of Asia are more limited or dependent on airline policies. Industry experts advise travelers to review the passenger rights rules of their departure country before flying.

Travelers affected by cancellations are encouraged to check airline apps or websites for rebooking options, retain documentation such as tickets and communications, and consider alternative routes or airports where necessary.

Experts caution against immediately accepting the first rebooking option without exploring other possibilities.Airlines have cited fuel shortages and rising costs as key drivers of schedule reductions, though such reasons do not automatically negate passenger rights in jurisdictions with stronger consumer protections.

The disruptions highlight mounting pressure on the aviation sector as it navigates elevated fuel costs and peak travel demand ahead of the summer season.

The Saudi embassy in Beirut said the advisory was issued due to the “repercussions of the current events,” noting that a travel ban to Lebanon had already been in place for several years.

The warning comes as Israeli forces deploy thousands of troops into southern Lebanon, aiming to secure territory up to the Litani River, about 30 kilometers from the border.

Since March 2, more than one million people have been displaced across Lebanon, according to the United Nations High Commissioner for Refugees. Around 136,000 are sheltering in approximately 660 collective sites, many of them overcrowded schools with limited sanitation access.

UNHCR representative Karolina Lindholm Billing said the situation on the ground was “extremely worrying,” warning of a real risk of humanitarian catastrophe if the conflict continues.

“Lebanon was already facing multiple crises, and this massive displacement is adding immense pressure,” she said, adding that affected civilians repeatedly expressed a desire to return home.

The UN refugee agency has appealed for more than $60 million to scale up its response, but officials say needs are rising faster than available funding as displacement accelerates.

The developments underscore mounting regional fallout from the conflict, with foreign governments increasingly issuing advisories to protect their citizens amid deteriorating security conditions.