Middle East airport flight cancellations running at 35% for May

Leading airport slot manager, Airport Coordination Limited, says 35% of take-off and landing slots during May have been cancelled across the 30 Middle East airports it serves in Dubai, Abu Dhabi, Saudi Arabia and Oman.

This is down on the 54% cancellation rates experienced in through March and April with services at United Arab Emirates airports in Dubai and Abu Dhabi most impacted by the US-Israel war on Iran.

CEO Neil Garwood says: “May already shows 35% of slots cancelled although the actual outcome will be dependent on events.

“The airports furthest from Iran, such as those in western Saudia Arabia, are less affected.”

ACL manages slots at 80 airports in the Middle East, United Kingdom, Europe, Australia and New Zealand.

Garwood says the conflict has caused significant collateral damage in all these markets with surging jet fuel prices and limited supply prompting airlines to raise airfares and cut flights.

“We’ve been tracking airports across 11 countries since the start of hostilities that have experienced varying degrees of disturbance,” Garwood says.

At Sydney Airport, where ACL manages the slots, cancellations for flights to and from the Middle East were 60% in March, increasing to 67% during April.

For May, Middle East slot cancellations at Sydney are currently 32%, a number that may increase during the month.

At London’s Heathrow Airport, where ACL also manages the slots, air transport movements to and from the Middle East fell 47% during March while passenger numbers for the month slumped 51% over the previous year according to airport data.

Middle East slot cancellations at Heathrow during May are, like Sydney, at 32%.

ACL’s Garwood says communication between airlines and the slot manager is crucial during a fast-moving crisis.

“Operators want early clarity around whether their future slot allocation will be protected if they cancel to help with planning and route workarounds,” he says.

“ACL issued tailored guidance to assist airlines with how they could respond to the events within the rules and regulations of each jurisdiction and worked with industry bodies to harmonise this where possible.

“We’ve seen airlines be agile about recycling slots for different purposes. For example, avoiding the Middle East region and putting extra flights on routes as demand patterns change.”

As fighting in Iran and Lebanon has subsided, Garwood says the focus is now on fuel supply and its impact on cancellations.

UK Slot Alleviation Fuel Shortages Update

The UK Government announced over the weekend its intention to manage potential fuel shortages, including allowing airlines to return slots and receive alleviation for NS26.

While the Government has set out its policy intent, any alleviation can only be applied once the UK Slot Regulation is formally amended. A short, targeted industry consultation is expected to take place, after which the Government will finalise the detail and lay a Statutory Instrument before Parliament.

ACL will prepare guidance in readiness for publication once the regulation is amended. Until that point, airlines are advised not to return slots that they intend to seek alleviation for under this announcement and to wait for the amended regulation and accompanying ACL guidance.

Official Government Release

ACL publishes sixth consultation on the Misuse of Slots Enforcement Code

Airport Coordination Limited (ACL) has published a consultation on proposed updates to the Misuse of Slots Enforcement Code. The Code sets out how ACL applies the enforcement provisions of the Airports Slot Allocation Regulations at coordinated UK airports.

The Enforcement Code supports the fair and transparent use of airport capacity by setting out how different types of slot misuse are addressed under the regulatory framework. This consultation includes proposed amendments to update regulatory references, clarify definitions and suggest additional examples of misuse within the Code.

This latest review considers the Code’s effectiveness from its application and reflecting feedback from airports, airlines and other stakeholders. The consultation provides an opportunity for interested parties to comment on the proposed changes.

How to Respond

The consultation has been extended to 31 May 2026.
Full details of how to respond are included in Section 4 of the consultation document.

Consultation Documents

Consultation Document

Appendix 1

Appendix 2

Stakeholders seeking further information can contact ACL at: consultation@acl-uk.org 

BHX S25 Sanction of TUI Airways

ACL sent a Notice of Final Decision to TUI Airways on 21 November 2025 notifying them that, pursuant to Regulation 16 of the Airports Slot Allocation Regulations, ACL had decided to impose a financial penalty in respect of two operations without a slot during Summer 2025 at Birmingham International Airport. Please Click Here

LHR S25 Sanction of British Airways

ACL sent a Notice of Final Decision to British Airways on 29th October 2025 notifying them that, pursuant to Regulation 16 of the Airports Slot Allocation Regulations, ACL
had decided to impose a financial penalty in respect of two no-slot operations during S25 at London Heathrow Airport. Please Click Here

LHR S25 Sanction of Emirates

ACL sent a Notice of Final Decision to Emirates on 24th November 2025, notifying them that, pursuant to Regulation 16 of the Airports Slot Allocation Regulations, ACL had decided to impose a financial penalty in respect of 13 operations in a significantly different way during Summer 25 at London Heathrow Airport. Please click here

LHR S25 Sanction of Tunisair

ACL sent a Notice of Final Decision to Tunisair on 20th October 2025 notifying them that, pursuant to Regulation 16 of the Airports Slot Allocation Regulations, ACL had decided to impose a financial penalty in respect of 10 significantly off-slot operations during Summer 25 at London Heathrow Airport. Please click here 

LHR S25 Sanction of American Airlines (2)

ACL sent a Notice of Final Decision to American Airlines on 30th October 2025 notifying them that, pursuant to Regulation 16 of the Airports Slot Allocation Regulations, ACL had decided to impose a financial penalty in respect of 50 significantly off-slot operations during Summer 25 at London Heathrow Airport. Please click here

 

LHR S25 Sanction of American Airlines

ACL sent a Notice of Final Decision to American Airlines on 30th October 2025 notifying them that, pursuant to Regulation 16 of the Airports Slot Allocation Regulations, ACL had decided to impose a financial penalty in respect of 102 operations operated in a significantly different way during Summer 25 at London Heathrow Airport. Please click here

 

Guernsey Airport Joins Forces with Airport Coordination Limited in New Data Collection Partnership

Airport Coordination Limited signs a three-year agreement to deliver Level 1 data collection services, supporting Guernsey Airport’s long-term growth and regional connectivity.

Airport Coordination Limited (ACL) is pleased to announce a new partnership with Guernsey Airport (GCI), commencing 1 October 2025. Under this three-year agreement, ACL will deliver Level 1 data collection services, supporting Guernsey Airport’s operational planning and future growth.

Guernsey Airport is a vital regional gateway connecting the Channel Islands to the UK and Europe, serving 700,000 passengers and around 29,000 aircraft movements in 2024. As the airport looks ahead to the future, it is focused on enhancing the passenger experience, supporting route development, and increasing commercial revenue.

ACL, with its proven expertise in data collection and facilitation services, including its longstanding support for Jersey Airport, is well positioned to assist Guernsey in achieving these goals by providing operational insights that optimise capacity and inform strategic planning.

Richard Thomasson, Guernsey Airport Director, said:

“Our partnership with ACL will provide greater insight into passenger and aircraft movements, allowing us to better understand airport capacity and improve operational efficiency accordingly.

“We are pleased to join ACL’s ever-growing network of airports across the British Isles, including many in our own route network. We look forward to benefitting from the increased coordination this will bring.”

Neil Garwood, Chief Executive Officer at ACL, said:

“We’re delighted to welcome Guernsey Airport to ACL’s growing network of UK and Channel Islands airports. This partnership is a celebration of the Channel Islands’ vital role in British aviation, and we’re proud to support Guernsey as it strengthens its connectivity and prepares for future growth. ACL has provided facilitation services to Jersey Airport for many years, and we’re excited to now extend our expertise to Guernsey. Together, we’re helping to build a more integrated and resilient regional aviation landscape.”

About ACL

Airport Coordination Limited is the world’s first independent airport slot coordinator. Based near London Heathrow Airport in Staines-upon-Thames, ACL provides world-leading coordination, schedule facilitation, and data collection services to airports around the world. With Guernsey Airport joining its network, ACL now supports nearly 80 airports globally, solidifying its position as the largest independent airport slot coordinator in the world.

Media Contact

Alison Chambers
Emerald Media
alison.chambers@emeraldmedia.co.uk