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Book Smart. Travel Responsibly.

BookSmart24 is an environmentally conscious travel booking App for global markets. 

Proprietary flight and travel booking engines analyze the environmental impact of each trip and prioritize the most carbon efficient option for easy selection. Duration and price are compared with the  individual CO2 impact of each itinerary. Thus the best travel option between two points is offered, always prioritizing low CO2 impact schedules.

The BookSmart24 SmartChoice is the best option for any trip: Lowest Emissions, Competitive Price, Comfortable Travel Duration.

Travelers often have little or no information on the environmental impact of their booking choices and more sustainable alternatives.

Research by various industry players reveals that people are receptive to information about the environmental footprint of their travel. In addition, it has been found that travelers are willing to pay more for more sustainable travel. In this context, consumers around the world are demanding better information on the environmental impact of different travel options.

BookSmart24 takes an important step by enabling travelers to easily identify the most sustainable flight for any city pair and compare it with the price and trip length of alternative travel options.


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The BookSmart24 SmartChoice is the best option for your trip: Lowest Emissions, Competitive Price, Comfortable Travel Duration. Learn that a "Green Flight" many times is not or only marginally more expensive than the cheapest travel option between 2 points.


BookSmart24 makes it simple to compare prices in contrast with the most sustainable itineraries. Thus users are given the necessary information to make informed booking decisions. Learn that the cheapest trip isn't necessarily your best travel option.


Booking engines many times offer travel itineraries that make little sense: Extended layovers and/or time consuming travel routes make the total duration of a trip uncomfortable. BookSmart24 avoids offering booking options that are not within reasonable parameters of comfortable total trip duration.

We are committed to making it easier for travellers to book sustainable trips.


We're committed to collaborating to make travel more sustainable.

Think about it for a moment:

One kilogram of CO2 has a volume of 509 liters. Or, to better illustrate, a normal balloon has a volume of about 2.5 liters, so one kilogram of CO2 could fill 204 balloons.

Some simple numbers on more sustainable travel options: Suppose we find a flight from London to Lisbon that emits 10% less CO2 than other flights: we would save 60 kg of CO2 per passenger (round trip), which is about 30,000 liters, or an amount of greenhouse gas emissions that could fill about 12,250 balloons.

And for a flight from London to New York, it would be even 10 times more….

BookSmart24 often offers travel options that save 30% or more in emissions.

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BookSmart24 SmartChoice

It is complicated. While most travelers when shopping for flights or other travel modalities try to find the cheapest available travel option, there is more to it than just price. Often it is overseen that the cheapest itineraries result in uncomfortable routes with intermediate stops, airport changes and long layovers. And when, in addition to these, sustainability considerations are important, consumers have little or no way of intelligently navigating between the multitudes of available options. BookSmart24 SmartChoice is the solution: The algorithms that evaluate the data to compare sustainability, price and travel duration are complex and process numerous parameters relating to the greenhouse gas emissions of the aircraft used, comparing them with those of other available travel options. SmartChoice prioritizes itineraries with the lowest CO2 impact while assuring that prices and trip duration remain within an average value as can be expected for the route in question.  Many times travel bookers will find that two-digit % emissions savings are possible with only little (or no..) additional cost.  
Book Smart. Travel Responsibly.

Our algorithms process numerous parameters on the greenhouse gas emissions of the aircraft and route used and compare them with those of other available travel options. SmartChoice prioritizes the travel route with the lowest CO2 impact while ensuring that prices and travel duration remain within an average value that can be expected for the route in question.

It’s easy (and smart) to make a sustainable booking decision.

Sustainable, affordable, fast.

You enter the departure and destination locations, start the search and receive the SmartChoice in real time, i.e. the most sustainable travel route – worldwide. Below that, you’ll find the cheapest travel option, followed by the fastest travel option. This gives you full transparency and allows you to directly compare the prices of the cheapest and the most sustainable option – and you will be surprised: Often the price difference is minor.

So more sustainability doesn’t necessarily have to be more expensive.

BookSmart24 will become the leading global site for sustainable travel bookings.

Digital Multimodal Mobility on a long-range scale will be combined with urban mobility concepts.

This will enable users to create complete sustainable Door to Door itineraries worldwide.

Trains and urban Multimodal Mobility

The ground work for the first global high-speed train GDS (Global Distribution System) has been completed  – BookSmart24 will make this service available to customers in the near future. In the final step, urban multimodal mobility concepts (public transport, car sharing, etc.) will be integrated on the platform in order to offer sustainable door-to-door travel services worldwide.


BookSmart24, theVision:

To stablish BookSmart24 as the leading reference portal for  sustainable travel worldwide.

We are committed to building a culture of sustainability and more sustainable travel worldwide.

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