Jetblue airways check in provides two options - you can check-in via your mobile or maybe you can check in at the airport as soon as you arrive. You can Jetblue flight check-in via your mobile application as well. Online check-in is available 24 hours before the scheduled departure of your flight.
It is recommended that you reach your airport 2 hours prior if you have to check-in your luggage via self-service check-in kiosks at the airport. In order to avoid last minute hurriedness, you should always reach the airport before 2 hours.