You are downloading the App in the Air XAP file v18.104.22.168 for Windows Phone. App in the Air is a free and useful Travel app: 900 000 people can’t be wrong - they choose App in the Air as their Personal Flight Concierge. Featured in Business Insider's 100 Greatest ... You can now download the offline XAP file to install & try it.
Download Locations for App in the Air 22.214.171.124 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline App in the Air XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.