Hello,
I found your offer very interesting for me. I'm skilled IT graduated developer with more than 7 years experience with development. I've developed wide range of Web, Desktop and Mobile projects. I have used such technologies as AngularJS, MVVM, MVC, Xamarin, IoC, Prism(Unity, MEF), etc.
If you would like I can develop web application with offline mode. I mean that first connection should be when user have internet connection and after that he can browse the web application offline. When internet connection appeared than web application is updated. So in this case your web application will be enable to work during the flight or in a place where no Internet connection.
Best regards,
Oleg