Your contribution supports additional SAF use beyond the amount the airline industry is legally required to use.
The Problem:
Aviation is one of the fastest-growing sources of greenhouse gas emissions. Aircraft still rely heavily on fossil fuels and consume them in large quantities. Without additional measures, the sector’s climate impact is expected to continue increasing in the coming decades.
Our Solution:
We help travelers make better-informed choices by integrating sustainability directly into the booking process. This allows you to easily compare flights based on their climate impact and reduce the emissions associated with your journey.
The science behind BookBetter
Every flight's footprint is shaped by four factors:
Distance
Aircraft Efficiency
Fuel Type
non-CO₂e impact
Together, these factors determine the emissions and overall climate impact of a journey. Together with our partners, we help travelers make more informed choices and reduce the environmental impact of their flights.
Reduce the distance flown by smarter travel choices
We help travelers make more informed travel choices and reduce their emissions.
- Prioritize efficient routes and direct flights to reduce emissions per journey.
- We encourage travelers to make informed choices, such as considering rail for short distances or combining multiple trips into one.
Choose a more efficient aircraft
Not all aircraft are equally fuel-efficient. Newer aircraft often consume less fuel per passenger and produce less CO₂e.
- Modern, fuel-efficient aircraft receive a higher sustainability score.
- Compare the climate impact of different flight options.
Support the use of Alternative Fuels (SAF)
SAF can significantly reduce the lifecycle emissions of flying compared with conventional fossil jet fuel.
- Option to purchase SAF during the booking process.
- Transparent registration and reporting of your purchased SAF.
Reduce the total climate impact of flying
In addition to CO₂, non-CO₂ effects, such as NOₓ and contrails (the white streaks left behind by aircraft), also have a significant impact on the climate.
- We show not only your flight’s CO₂ emissions but also the estimated climate impact of contrails.
What is SAF?
Alternative jet fuel, also called Sustainable Aviation Fuel (SAF), is an alternative to fossil jet fuel. It is produced from sustainable feedstocks, such as:
- Used cooking oil and waste fats
- Agricultural residues
- Renewable electricity and captured CO₂ (also known as e-SAF)
Depending on the production pathway, SAF can reduce the lifecycle emissions of flying by more than 80% compared with conventional jet fuel. It can be used in today’s aircraft and airport infrastructure without modification.
Why is SAF important?
2050
The aviation industry has committed to achieving net-zero CO₂ emissions by 2050. SAF is expected to be one of the most important solutions to reach this goal. (ICAO)
80%
Depending on the production pathway, Sustainable Aviation Fuel (SAF) can reduce the lifecycle emissions of flying by more than 80% compared with conventional jet fuel. (ICAO)
4%
When non-CO₂ effects, such as contrails, are included, aviation is responsible for around 4% of human-induced global warming. (ICAO)
Certified fuel. Proven impact.
Your SAF contribution is independently registered and verified, giving you full transparency about the fuel, the emissions reduction achieved, and its final delivery.
- Independently certified SAF
- Full traceability through recognized registries
- Personal certificate after your trip
Why we focus on flying
When you travel by plane, the vast majority of your trip’s emissions come from the flight itself. That’s why focusing on reducing the impact of your flight is the most important first step.
At BookBetter, we encourage trains or other lower-emission options instead of planes. But when flying is the only practical choice, we help you reduce the overall impact.