Middle East Conflict: Airlines Reroute as Airspace Closes – Flight Disruptions Explained

How the US-Israeli War on Iran Created a Massive Hole in Global Airspace

A war engulfing the Middle East has cleared the region’s skies, forcing airlines to make drastic rerouting plans and leaving a massive void in usually busy global airspace. With Israel and the US conducting strikes on Iran, and Tehran responding with missile and drone attacks, airlines have been forced to divert passenger jets away from the Gulf or risk a catastrophic accident.

How did the airspace close? The world’s airspace is divided into Flight Information Regions (FIRs), which broadly follow international borders. Governments are usually responsible for providing air traffic services within these regions. In a conflict situation, authorities issue a Notam, or Notice to Air Missions, to alert aircraft to restrictions or closures. Multiple FIRs in the Middle East have been closed, creating a 2.8m sq km (1.08m sq mile) gap in available airspace.

It’s not just governmental closures impacting flight paths. Airlines also make independent decisions based on warnings from their registering countries and insurance coverage. Dispatch teams constantly monitor events to ensure safe routes. As aviation expert David Learmount explains, “the decision about whether a piece of airspace is safe…is that of the airline and the airline’s dispatchers, depending on the level of risk.” This explains why airspace over Lebanon, despite not being formally closed, sees limited airline traffic due to ongoing Israeli strikes.

What Have Airlines Done to Adapt?

Airlines have rapidly adjusted routes, leveraging pre-existing contingency plans developed over years for potential Middle Eastern disruptions. These plans included pre-programmed alternative routes into navigation systems, allowing for immediate rerouting when bombing began on Saturday. Two primary options have emerged: a northern route skirting the Caucasus (but below Ukrainian airspace) and a southern route through Egypt, Saudi Arabia, and Oman.

These reroutings are creating bottlenecks, leading to delays and cancellations. Learmount notes, “This problem is not getting better, it’s getting worse…The northern one is a bottleneck of narrow airspace…Or there is the option of going through southern Saudi Arabia.”

Why Are Some Flights Still Operating?

While major hub airports like Dubai have seen significant disruptions, limited operations have resumed for repatriation flights and essential transit. Here’s occurring under strict conditions, with partial closures of FIRs like the Emirates FIR allowing flights with special permission. Occasional flights observed in seemingly closed airspace are likely operating under these exceptions. Oman’s airspace remains open, despite reported attacks.

The Impact: Delays, Cancellations, and Financial Costs

The airspace closures are causing significant disruptions, including delays, cancellations, and increased financial burdens for airlines. The rerouting adds to flight times and fuel consumption, increasing operational costs. Steve Fox, director of operations control at Nats, described the situation as creating a “huge black hole” in Middle Eastern airspace, leading to “significantly longer routings, flight times and fuel uplifts.” This has contributed to a sell-off of airline stocks.

As of March 4, 2026, the death toll in Lebanon has risen to at least 50 killed and over 300 injured due to Israeli strikes since Monday. The US embassy in Jordan has issued a shelter-in-place order, and non-emergency US government personnel and their families have been ordered to depart from several countries in the region, including Jordan, Bahrain, Iraq, Qatar, Kuwait, and the United Arab Emirates due to security concerns.

Confirmed vs. Unclear Details

Confirmed: Israel has exchanged further strikes with Iran and continued its assault on Lebanon. Iran is retaliating with attacks targeting Israel, US bases, and Gulf nations. The US has closed embassies in Riyadh and Kuwait and ordered personnel departures from multiple countries. Over 787 people have been killed in Iran since the war began.

Unclear: Details were not provided regarding the specific nature of the attacks on US bases or the extent of damage to infrastructure. The long-term impact on global air travel and airline finances remains to be seen. The duration of the airspace closures is currently unknown.

What Happens Next?

The situation remains highly fluid. Airlines will continue to monitor developments and adjust routes as needed. The US State Department will likely continue to assess the security situation and provide guidance to American citizens in the region. The intensity of the conflict and the extent of airspace closures will depend on the actions of all parties involved. Fox predicts that “things will be uncertain for some time to approach.”