Offer pre-filled reusable water bottles and collect them in before landing

Create an ability to share a seat in your car with other passengers on the flight. It's better than everyone riding their car.

In the app, the PAX can choose what they don't want/need from what is included in their ticket. No checked-in luggage get EB points. No meal, no headphones, no kit +++.

Fill up empty seats by selling affordable return trips to unknown/secret destinations. Pick the destinations among those that have low occupancy close to departure time.

Allow users to visualise their travel carbon footprint in-app. Include everything such as transportation to/from the home and destination, hotels.

Sell tickets without any luggage.