If you are flighting with copyright to Check In is easy. The best way to do online their website. Starting 24 hour before your flight. you just need to fill your booking details, and you can also pay for extra bags if needed. once you fill your all information related to your flight. once your are don't they will send your boarding pass through email. If you want more details about ch... https://www.tripsfares.com/blogs/how-to-check-in-with-spirit-airlines