WOW air
WOW Air, Iceland's low-cost airline, recently made the switch to wagtail for their 15 marketing websites, each maintained as a separate wagtail site within the same project. Along with the switch to wagtail, the booking engine which sells the major part of WOW's airline tickets, is being written from scratch in python and React.js and managed in wagtail.
Overcast Software consulted on this project and has worked extensively on the booking engine for the last 6 months (2015-2016).
Visit site