Email templates for Airlines (see Flight Search Aggregator templates below)

For Emirates:

1. Please send this email to: pr@emirates.com, customer.affairs@emirates.com and EmiratesUK@redconsultancy.com (or find the relevant Emirates media email address for your region here: https://www.emirates.com/media-centre/contact/).

2. Please also let us know via the ‘Have Your Say’ section when you have sent the email, so we can keep track of which airlines have been contacted!

Subject: Request for transparency and action on non-CO2 climate impact

Dear Emirates Group,

I write to you as a [faithful airline customer and] responsible citizen.

It has come to my attention that Emirates is not on the Airline Contrail Index. This is a list of airlines, now numbering 40, which have taken some form of action on contrails. Contrails, the white lines which form behind airplanes, are now understood by the scientific community the UK Government and the EU, to be a major contributor to global warming, with some estimating that non-CO2 impacts to constitute up to 66% of aviation’s total climate impact. While there is some uncertainty regarding the exact magnitude of the warming created by contrails, there is a consensus that they have enough of an impact to necessitate immediate action, and that the greatest risk associated with contrails is inaction.

In spite of the fact that you are the world's fourth-largest airline in terms of Available Seat Kilometres and the second-largest in terms of freight tonne-kilometers flown, you have not even publicly acknowledged the climate effects of contrails, nor joined with other major airlines, like British Airways, American Airlines and Etihad Airways in:

Amending sustainability webpages to be transparent about the non-CO2 impacts the airline is responsible for.
Collaborating on, or supporting, research projects on contrails.
Participating in contrail mitigation research and contrail avoidance trials, which have shown potential to be effective (reducing the climate effects of contrails by 69%). Emirates operates many flights over the Indian Ocean and South Atlantic, where there are relatively low levels of air traffic and so would be ideal places for contrail avoidance manoeuvres.

This is made all the more regrettable by the fact that Emirates was ranked as 9th in the world for creating the most warming contrails, according to the Contrail Opportunity Index produced by Estuaire.com. This index also points out that the Emirates flight Singapore Changi (WSSS) → Dubai International (OMDB) is the 2nd worst for producing warming contrails of any flight in the world.

Because of this, I ask that you take the steps outlined above as soon as possible. In addition, I ask that you follow the example of Google Flights in making it clear what contrail warming risks are posed by each individual flight at the point where flight bookings are made.

Transparency and action on contrails, as well as CO2, isnecessary, urgent and possible.

Yours sincerely,

[Your name]

For other airlines:

1. Please send this email to the airline's customer service email address. In case this is hard to find, please use the first email address for the airline that comes up on Google.

2. Please also let us know via the ‘Have Your Say’ section when you have sent the email, so we can keep track of which airlines have been contacted!

Subject: Request for transparency and action on non-CO2 climate impact

"Dear [Airline],

[I am one of your customers.] Are you transparent with us regarding the non-CO2 climate impacts of your flights?

Do you incorporate contrail avoidance into your flight routing or are you planning to take part in one of the many trials in contrail avoidance?

Contrails are estimated to be responsible for around 50% of aviation’s climate impact, with some estimates putting the warming contribution as high as 66%. However, according to the March 2026 report from the UK Government’s Contrail Impact Mitigation Task & Finish Group, the current maturity level for Airline Operations regarding contrails stands at Level 1 of the report’s maturity model, lagging behind all other workstreams, like ANSP operations and Fuel Producers.

According to the ICCT: “Contrail avoidance in particular is modelled to be the most impactful and cost-effective lever, accounting for 40% of total avoidable warming by 2050”. Here is a list of other websites explaining how necessary, easy and effective it is contrail avoidance is:

Also, I would like to know what the CO2 emissions and contrail warming estimations are for my next flight. Please put contrail warming estimates on the flight selection/booking page as Google Flights does. I am not the only one who wants this. Feedback from over 9,500 participants in an EU-wide survey in 2019 showed that 80% of air passengers would like more details on the emissions of flights they take, and that only 5% said they had access to such information.

Transparency and action on contrails, as well as CO2, is necessary, urgent and possible.

Yours sincerely

[Your Name].

Email templates for Flight Search Aggregators (FSAs)

For FSAs which do not provide non-CO2 climate impact information on their websites:

1. Please send this email to one (or all) of the following (list last updated April 2026):

Skyscanner — press@skyscanner.net
Trip.com Group — pr@trip.com

2. Please also let us know via the ‘Have Your Say’ section when you have sent the email, so we can keep track of which organisations have been contacted!

Subject: Request for transparency and action on aviation's non-CO2 climate impact

Dear [Flight search aggregator],

[I am one of your customers and regularly use your platform to search for flights.] I am writing to request improved transparency in how climate impacts are presented at the point of selecting flights on your website.

While your platform already provides CO2e emissions information, this does not reflect the full climate impact of aviation. Scientific evidence indicates that non-CO₂ effects, particularly from contrails, account for around 50% of aviation’s total warming impact with some estimates as high as 66% yet these effects are almost entirely invisible to consumers. Most passengers are unaware of contrails altogether, let alone able to compare flights based on their full climate impact.

The latest version of the Travel Impact Model (TIM), developed by Google and used within the Travalyst framework, explicitly recommends that contrail warming risks be provided to customers as a separate output alongside CO₂e. Google Flights shows how this can and should be done. As your site is not doing this, it is either because you are using an outdated version of the TIM model, or because you are willingly disregarding and therefore concealing the non-CO2 impacts of the flights you advertise.

I therefore urge you to:

Display contrail warming risk alongside CO₂ emissions, as Google Flights does.
Clearly communicate that CO₂ alone does not represent the total climate impact of aviation.

This will enable users to make informed choices based on the full climate impact of aviation.

I am not the only one who wants this. Feedback from over 9,500 participants in an EU-wide survey showed that 80% of air passengers would like more details on the emissions of flights they take, and that only 5% said they had access to such information.

Improving transparency in this way would represent a meaningful step toward informed consumer choice and trigger genuine progress on climate issues.

Yours sincerely,

[Your name]

For FSAs which do not provide ANY climate impact information on their websites:

1. Please send this email to one (or all) of the following (list last updated April 2026):

Booking.com — customer.service@booking.com
Expedia Group — sustainability@expediagroup.com
KAYAK — press@kayak.com
Kiwi.com — press@kiwi.com
Momondo — press@momondo.com

2. Please also let us know via the ‘Have Your Say’ section when you have sent the email, so we can keep track of which organistions have been contacted!

Subject: Request for transparency and action on aviation's CO2 and non-CO2 climate impact

Dear [Flight search aggregator],

At present, your website does not provide emissions data to users which makes it difficult for passengers to make informed decisions.

It is important to note that aviation’s climate impact is not limited to CO₂ emissions. Scientific research shows that non-CO₂ effects, especially contrails, contribute around 50% of total warming from aviation. Despite this, awareness of contrails among the public remains extremely low, and almost no booking platforms provide this information, with the sole exception of Google Flights.

The Travel Impact Model (TIM), used by Google and developed within the Travalyst framework, highlights the importance of providing customers with separate information regarding both CO₂ and non-CO₂ effects.

I therefore urge you to:

Introduce CO₂ emissions data for all the flights you advertise, at the point of flight selection.
Place non-CO₂ climate impacts as contrail warming risk alongside CO2 data, as Google Flights does, and as recommended by TIM.

Providing this information would align your platform with emerging industry standards and significantly improve transparency for your users.

Yours sincerely,

[Your name]