Nowadays passengers are more and more demanding for what concerns their comfort and wellbeing during all phases of the flight experience. Unfortunately, current travel experiences of passengers are often uncomfortable and very stressing and travelers are frequently complaining for the overall conditions to which they are exposed to, starting from the moment they board the plane, till disembark and baggage claim. Such a situation could be radically improved through the development of innovative design concept solutions, technologies and approaches to be applied in the design of cabin interiors. RATIOS project, through innovative design solutions for cabin interior, will address the following main passengers’ pain points: boarding bottlenecks; disembark problems that can be very stressful especially for passengers booked on connecting flights; on board flight experiences (examples of problematic situations are: currently, especially in narrow-body economy class, the reduced space between seats implies an unpleasant limited legroom; poor cleanliness and hygiene).RATIOS project aims at addressing the multifaceted problematic situation by exploring, conceiving and developing up to TRL 3/4 highly innovative design concept solutions whilst ensuring the identification and evaluation of the related enabling technologies. The project will focus on cabin interiors for regional Aircrafts, through Human-Centered Design Approach, addressing the following sub-objectives: explore and evaluate innovative layout solutions for cabin layout, starting from a basic aircraft configuration; improve and optimize main cabin items to improve passengers’ comfort and on-board travelling experience; optimize boarding and disembark procedures by rethinking and optimizing cabin layout and baggage storage; explore and evaluate the use of new technologies for on board connectivity, virtual, augmented and immersive reality, noise and vibration management to conceive and design new cabin interiors able to deliver seamless connected mobility whilst ensuring personal privacy. The achievements of RATIOS objectives leveraging on both physical and virtual touch points, and exploiting fast developing technologies in the digital world, will lead to an optimized cabin environment able to improve all the above- mentioned passengers ‘critical situations, offering them more pleasant travel experiences combined with higher levels of efficiency and hygiene. This will not only generate immediate and physical impacts on the travelers, but will also contribute to offer innovative solutions, which are perfectly in line with air companies’ expectations