The loading spinner will continue to spin while the flight is uploading to the flights database. In the majority of cases, this will take between 5 and 15 seconds.
If the loading spinner does not disappear after 15 seconds plase close the pay.per.fly application. This can occur when you have poor mobile reception/coverage. The flight will not be lost and will be stored on your mobile device. The next time you use pay.per.fly, your older flights will be uploaded in the background.