These guys 
made some tremendous work and are promising to change the online travel world:
https://medium.com/locktrip/locktrip-deploys-biggest-update-yet-eb8a6891d4e5
Most people are skeptic when they see an article like this, but wait a minute... When it comes to travel we all know what is the amount of middlemen in the distribution tree. If we assume that there is a place where middlemen are reduced to minimum and hotel bookings are at 0% commission, then why not try this search engine: https://bit.ly/2CcoOhW